diff --git a/ereuse_devicehub/resources/agent/models.py b/ereuse_devicehub/resources/agent/models.py
index aa53d6e5..6b647dc2 100644
--- a/ereuse_devicehub/resources/agent/models.py
+++ b/ereuse_devicehub/resources/agent/models.py
@@ -2,6 +2,7 @@ from itertools import chain
 from operator import attrgetter
 from uuid import uuid4
 
+from citext import CIText
 from flask import current_app as app, g
 from sqlalchemy import Column, Enum as DBEnum, ForeignKey, Unicode, UniqueConstraint
 from sqlalchemy.dialects.postgresql import UUID
@@ -9,11 +10,11 @@ from sqlalchemy.ext.declarative import declared_attr
 from sqlalchemy.orm import backref, relationship, validates
 from sqlalchemy_utils import EmailType, PhoneNumberType
 from teal import enums
-from teal.db import DBError, INHERIT_COND, POLYMORPHIC_ID, POLYMORPHIC_ON
+from teal.db import DBError, INHERIT_COND, POLYMORPHIC_ID, POLYMORPHIC_ON, check_lower
 from teal.marshmallow import ValidationError
 from werkzeug.exceptions import NotImplemented, UnprocessableEntity
 
-from ereuse_devicehub.resources.models import STR_SIZE, STR_SM_SIZE, Thing
+from ereuse_devicehub.resources.models import STR_SM_SIZE, Thing
 from ereuse_devicehub.resources.user.models import User
 
 
@@ -27,11 +28,11 @@ class JoinedTableMixin:
 class Agent(Thing):
     id = Column(UUID(as_uuid=True), primary_key=True, default=uuid4)
     type = Column(Unicode, nullable=False)
-    name = Column(Unicode(length=STR_SM_SIZE))
+    name = Column(CIText())
     name.comment = """
         The name of the organization or person.
     """
-    tax_id = Column(Unicode(length=STR_SM_SIZE))
+    tax_id = Column(Unicode(length=STR_SM_SIZE), check_lower('tax_id'))
     tax_id.comment = """
         The Tax / Fiscal ID of the organization, 
         e.g. the TIN in the US or the CIF/NIF in Spain.
@@ -111,7 +112,7 @@ class Membership(Thing):
 
     For example, because the individual works in or because is a member of.
     """
-    id = Column(Unicode(length=STR_SIZE))
+    id = Column(Unicode(), check_lower('id'))
     organization_id = Column(UUID(as_uuid=True), ForeignKey(Organization.id), primary_key=True)
     organization = relationship(Organization,
                                 backref=backref('members', collection_class=set, lazy=True),
diff --git a/ereuse_devicehub/resources/agent/schemas.py b/ereuse_devicehub/resources/agent/schemas.py
index 6b5d1365..459319db 100644
--- a/ereuse_devicehub/resources/agent/schemas.py
+++ b/ereuse_devicehub/resources/agent/schemas.py
@@ -1,7 +1,7 @@
 from marshmallow import fields as ma_fields, validate as ma_validate
 from marshmallow.fields import Email
 from teal import enums
-from teal.marshmallow import EnumField, Phone
+from teal.marshmallow import EnumField, Phone, SanitizedStr
 
 from ereuse_devicehub.marshmallow import NestedOn
 from ereuse_devicehub.resources.models import STR_SIZE, STR_SM_SIZE
@@ -10,9 +10,10 @@ from ereuse_devicehub.resources.schemas import Thing
 
 class Agent(Thing):
     id = ma_fields.UUID(dump_only=True)
-    name = ma_fields.String(validate=ma_validate.Length(max=STR_SM_SIZE))
-    tax_id = ma_fields.String(validate=ma_validate.Length(max=STR_SM_SIZE),
-                              data_key='taxId')
+    name = SanitizedStr(validate=ma_validate.Length(max=STR_SM_SIZE))
+    tax_id = SanitizedStr(lower=True,
+                          validate=ma_validate.Length(max=STR_SM_SIZE),
+                          data_key='taxId')
     country = EnumField(enums.Country)
     telephone = Phone()
     email = Email()
@@ -25,7 +26,7 @@ class Organization(Agent):
 class Membership(Thing):
     organization = NestedOn(Organization)
     individual = NestedOn('Individual')
-    id = ma_fields.String(validate=ma_validate.Length(max=STR_SIZE))
+    id = SanitizedStr(lower=True, validate=ma_validate.Length(max=STR_SIZE))
 
 
 class Individual(Agent):
diff --git a/ereuse_devicehub/resources/device/models.py b/ereuse_devicehub/resources/device/models.py
index 644ddf1b..ffb8eecd 100644
--- a/ereuse_devicehub/resources/device/models.py
+++ b/ereuse_devicehub/resources/device/models.py
@@ -11,12 +11,13 @@ from sqlalchemy.orm import ColumnProperty, backref, relationship, validates
 from sqlalchemy.util import OrderedSet
 from sqlalchemy_utils import ColorType
 from stdnum import imei, meid
-from teal.db import CASCADE, POLYMORPHIC_ID, POLYMORPHIC_ON, ResourceNotFound, check_range
+from teal.db import CASCADE, POLYMORPHIC_ID, POLYMORPHIC_ON, ResourceNotFound, check_lower, \
+    check_range
 from teal.marshmallow import ValidationError
 
 from ereuse_devicehub.resources.enums import ComputerChassis, DataStorageInterface, DisplayTech, \
     RamFormat, RamInterface
-from ereuse_devicehub.resources.models import STR_BIG_SIZE, STR_SIZE, STR_SM_SIZE, Thing
+from ereuse_devicehub.resources.models import STR_SM_SIZE, Thing
 
 
 class Device(Thing):
@@ -29,14 +30,14 @@ class Device(Thing):
         The identifier of the device for this database.
     """
     type = Column(Unicode(STR_SM_SIZE), nullable=False)
-    hid = Column(Unicode(STR_BIG_SIZE), unique=True)
+    hid = Column(Unicode(), check_lower('hid'), unique=True)
     hid.comment = """
         The Hardware ID (HID) is the unique ID traceability systems 
         use to ID a device globally.
     """
-    model = Column(Unicode(STR_BIG_SIZE))
-    manufacturer = Column(Unicode(STR_SIZE))
-    serial_number = Column(Unicode(STR_SIZE))
+    model = Column(Unicode(), check_lower('model'))
+    manufacturer = Column(Unicode(), check_lower('manufacturer'))
+    serial_number = Column(Unicode(), check_lower('serial_number'))
     weight = Column(Float(decimal_return_scale=3), check_range('weight', 0.1, 3))
     weight.comment = """
         The weight of the device in Kgm.
diff --git a/ereuse_devicehub/resources/device/schemas.py b/ereuse_devicehub/resources/device/schemas.py
index f7eab413..e7160511 100644
--- a/ereuse_devicehub/resources/device/schemas.py
+++ b/ereuse_devicehub/resources/device/schemas.py
@@ -3,7 +3,7 @@ from marshmallow.fields import Boolean, Float, Integer, Str
 from marshmallow.validate import Length, OneOf, Range
 from sqlalchemy.util import OrderedSet
 from stdnum import imei, meid
-from teal.marshmallow import EnumField, ValidationError
+from teal.marshmallow import EnumField, SanitizedStr, ValidationError
 
 from ereuse_devicehub.marshmallow import NestedOn
 from ereuse_devicehub.resources.device import models as m
@@ -15,14 +15,14 @@ from ereuse_devicehub.resources.schemas import Thing, UnitCodes
 
 class Device(Thing):
     id = Integer(description=m.Device.id.comment, dump_only=True)
-    hid = Str(dump_only=True, description=m.Device.hid.comment)
+    hid = SanitizedStr(lower=True, dump_only=True, description=m.Device.hid.comment)
     tags = NestedOn('Tag',
                     many=True,
                     collection_class=OrderedSet,
                     description='The set of tags that identify the device.')
-    model = Str(validate=Length(max=STR_BIG_SIZE))
-    manufacturer = Str(validate=Length(max=STR_SIZE))
-    serial_number = Str(data_key='serialNumber')
+    model = SanitizedStr(lower=True, validate=Length(max=STR_BIG_SIZE))
+    manufacturer = SanitizedStr(lower=True, validate=Length(max=STR_SIZE))
+    serial_number = SanitizedStr(lower=True, data_key='serialNumber')
     weight = Float(validate=Range(0.1, 3), unit=UnitCodes.kgm, description=m.Device.weight.comment)
     width = Float(validate=Range(0.1, 3), unit=UnitCodes.m, description=m.Device.width.comment)
     height = Float(validate=Range(0.1, 3), unit=UnitCodes.m, description=m.Device.height.comment)
diff --git a/ereuse_devicehub/resources/event/models.py b/ereuse_devicehub/resources/event/models.py
index 5c041625..198ea7b0 100644
--- a/ereuse_devicehub/resources/event/models.py
+++ b/ereuse_devicehub/resources/event/models.py
@@ -3,6 +3,7 @@ from datetime import datetime, timedelta
 from typing import Set, Union
 from uuid import uuid4
 
+from citext import CIText
 from flask import current_app as app, g
 from sqlalchemy import BigInteger, Boolean, CheckConstraint, Column, DateTime, Enum as DBEnum, \
     Float, ForeignKey, Interval, JSON, Numeric, SmallInteger, Unicode, event, orm
@@ -13,7 +14,7 @@ from sqlalchemy.orm import backref, relationship, validates
 from sqlalchemy.orm.events import AttributeEvents as Events
 from sqlalchemy.util import OrderedSet
 from teal.db import ArrayOfEnum, CASCADE, CASCADE_OWN, INHERIT_COND, IP, POLYMORPHIC_ID, \
-    POLYMORPHIC_ON, StrictVersionType, URL, check_range
+    POLYMORPHIC_ON, StrictVersionType, URL, check_lower, check_range
 from teal.enums import Country, Currency, Subdivision
 from teal.marshmallow import ValidationError
 
@@ -25,7 +26,7 @@ from ereuse_devicehub.resources.enums import AppearanceRange, BOX_RATE_3, BOX_RA
     FunctionalityRange, PriceSoftware, RATE_NEGATIVE, RATE_POSITIVE, RatingRange, RatingSoftware, \
     ReceiverRole, SnapshotExpectedEvents, SnapshotSoftware, TestHardDriveLength
 from ereuse_devicehub.resources.image.models import Image
-from ereuse_devicehub.resources.models import STR_BIG_SIZE, STR_SIZE, STR_SM_SIZE, Thing
+from ereuse_devicehub.resources.models import STR_SM_SIZE, Thing
 from ereuse_devicehub.resources.user.models import User
 
 """
@@ -43,7 +44,7 @@ class JoinedTableMixin:
 class Event(Thing):
     id = Column(UUID(as_uuid=True), primary_key=True, default=uuid4)
     type = Column(Unicode, nullable=False)
-    name = Column(Unicode(STR_BIG_SIZE), default='', nullable=False)
+    name = Column(CIText(), default='', nullable=False)
     name.comment = """
         A name or title for the event. Used when searching for events.
     """
@@ -263,13 +264,13 @@ class Remove(EventWithOneDevice):
 class Allocate(JoinedTableMixin, EventWithMultipleDevices):
     to_id = Column(UUID, ForeignKey(User.id))
     to = relationship(User, primaryjoin=User.id == to_id)
-    organization = Column(Unicode(STR_SIZE))
+    organization = Column(CIText())
 
 
 class Deallocate(JoinedTableMixin, EventWithMultipleDevices):
     from_id = Column(UUID, ForeignKey(User.id))
     from_rel = relationship(User, primaryjoin=User.id == from_id)
-    organization = Column(Unicode(STR_SIZE))
+    organization = Column(CIText())
 
 
 class EraseBasic(JoinedWithOneDeviceMixin, EventWithOneDevice):
@@ -588,7 +589,7 @@ class Test(JoinedWithOneDeviceMixin, EventWithOneDevice):
 class TestDataStorage(Test):
     id = Column(UUID(as_uuid=True), ForeignKey(Test.id), primary_key=True)
     length = Column(DBEnum(TestHardDriveLength), nullable=False)  # todo from type
-    status = Column(Unicode(STR_SIZE), nullable=False)
+    status = Column(Unicode(), check_lower('status'), nullable=False)
     lifetime = Column(Interval)
     assessment = Column(Boolean)
     reallocated_sector_count = Column(SmallInteger)
@@ -681,13 +682,13 @@ class Live(JoinedWithOneDeviceMixin, EventWithOneDevice):
                                     check_range('subdivision_confidence', 0, 100),
                                     nullable=False)
     subdivision = Column(DBEnum(Subdivision), nullable=False)
-    city = Column(Unicode(STR_SM_SIZE), nullable=False)
+    city = Column(Unicode(STR_SM_SIZE), check_lower('city'), nullable=False)
     city_confidence = Column(SmallInteger,
                              check_range('city_confidence', 0, 100),
                              nullable=False)
-    isp = Column(Unicode(length=STR_SM_SIZE), nullable=False)
-    organization = Column(Unicode(length=STR_SIZE))
-    organization_type = Column(Unicode(length=STR_SM_SIZE))
+    isp = Column(Unicode(STR_SM_SIZE), check_lower('isp'), nullable=False)
+    organization = Column(Unicode(STR_SM_SIZE), check_lower('organization'))
+    organization_type = Column(Unicode(STR_SM_SIZE), check_lower('organization_type'))
 
     @property
     def country(self) -> Country:
@@ -713,7 +714,7 @@ class Trade(JoinedTableMixin, EventWithMultipleDevices):
     shipping_date.comment = """
             When are the devices going to be ready for shipping?
         """
-    invoice_number = Column(Unicode(length=STR_SIZE))
+    invoice_number = Column(CIText())
     invoice_number.comment = """
             The id of the invoice so they can be linked.
         """
diff --git a/ereuse_devicehub/resources/event/schemas.py b/ereuse_devicehub/resources/event/schemas.py
index 372fd7d4..ad246617 100644
--- a/ereuse_devicehub/resources/event/schemas.py
+++ b/ereuse_devicehub/resources/event/schemas.py
@@ -7,7 +7,7 @@ from marshmallow.fields import Boolean, DateTime, Decimal, Float, Integer, List,
 from marshmallow.validate import Length, Range
 from sqlalchemy.util import OrderedSet
 from teal.enums import Country, Currency, Subdivision
-from teal.marshmallow import EnumField, IP, Version
+from teal.marshmallow import EnumField, IP, SanitizedStr, Version
 from teal.resource import Schema
 
 from ereuse_devicehub.marshmallow import NestedOn
@@ -24,11 +24,13 @@ from ereuse_devicehub.resources.user.schemas import User
 
 class Event(Thing):
     id = UUID(dump_only=True)
-    name = String(default='', validate=Length(max=STR_BIG_SIZE), description=m.Event.name.comment)
+    name = SanitizedStr(default='',
+                        validate=Length(max=STR_BIG_SIZE),
+                        description=m.Event.name.comment)
     incidence = Boolean(default=False, description=m.Event.incidence.comment)
     closed = Boolean(missing=True, description=m.Event.closed.comment)
     error = Boolean(default=False, description=m.Event.error.comment)
-    description = String(default='', description=m.Event.description.comment)
+    description = SanitizedStr(default='', description=m.Event.description.comment)
     start_time = DateTime(data_key='startTime', description=m.Event.start_time.comment)
     end_time = DateTime(data_key='endTime', description=m.Event.end_time.comment)
     snapshot = NestedOn('Snapshot', dump_only=True)
@@ -57,16 +59,18 @@ class Remove(EventWithOneDevice):
 class Allocate(EventWithMultipleDevices):
     to = NestedOn(User,
                   description='The user the devices are allocated to.')
-    organization = String(validate=Length(max=STR_SIZE),
-                          description='The organization where the user was when this happened.')
+    organization = SanitizedStr(validate=Length(max=STR_SIZE),
+                                description='The organization where the '
+                                            'user was when this happened.')
 
 
 class Deallocate(EventWithMultipleDevices):
     from_rel = Nested(User,
                       data_key='from',
                       description='The user where the devices are not allocated to anymore.')
-    organization = String(validate=Length(max=STR_SIZE),
-                          description='The organization where the user was when this happened.')
+    organization = SanitizedStr(validate=Length(max=STR_SIZE),
+                                description='The organization where the '
+                                            'user was when this happened.')
 
 
 class EraseBasic(EventWithOneDevice):
@@ -187,9 +191,9 @@ class EreusePrice(Price):
 
 
 class Install(EventWithOneDevice):
-    name = String(validate=Length(min=4, max=STR_BIG_SIZE),
-                  required=True,
-                  description='The name of the OS installed.')
+    name = SanitizedStr(validate=Length(min=4, max=STR_BIG_SIZE),
+                        required=True,
+                        description='The name of the OS installed.')
     elapsed = TimeDelta(precision=TimeDelta.SECONDS, required=True)
 
 
@@ -263,7 +267,7 @@ class Test(EventWithOneDevice):
 
 class TestDataStorage(Test):
     length = EnumField(TestHardDriveLength, required=True)
-    status = String(validate=Length(max=STR_SIZE), required=True)
+    status = SanitizedStr(lower=True, validate=Length(max=STR_SIZE), required=True)
     lifetime = TimeDelta(precision=TimeDelta.DAYS)
     assessment = Boolean()
     reallocated_sector_count = Integer(data_key='reallocatedSectorCount')
@@ -329,11 +333,11 @@ class Live(EventWithOneDevice):
     subdivision_confidence = Integer(dump_only=True, data_key='subdivisionConfidence')
     subdivision = EnumField(Subdivision, dump_only=True)
     country = EnumField(Country, dump_only=True)
-    city = String(dump_only=True)
+    city = SanitizedStr(lower=True, dump_only=True)
     city_confidence = Integer(dump_only=True, data_key='cityConfidence')
-    isp = String(dump_only=True)
-    organization = String(dump_only=True)
-    organization_type = String(dump_only=True, data_key='organizationType')
+    isp = SanitizedStr(lower=True, dump_only=True)
+    organization = SanitizedStr(lower=True, dump_only=True)
+    organization_type = SanitizedStr(lower=True, dump_only=True, data_key='organizationType')
 
 
 class Organize(EventWithMultipleDevices):
@@ -350,7 +354,7 @@ class CancelReservation(Organize):
 
 class Trade(EventWithMultipleDevices):
     shipping_date = DateTime(data_key='shippingDate')
-    invoice_number = String(validate=Length(max=STR_SIZE), data_key='invoiceNumber')
+    invoice_number = SanitizedStr(validate=Length(max=STR_SIZE), data_key='invoiceNumber')
     price = NestedOn(Price)
     to = NestedOn(Agent, only_query='id', required=True, comment=m.Trade.to_comment)
     confirms = NestedOn(Organize)
diff --git a/ereuse_devicehub/resources/image/models.py b/ereuse_devicehub/resources/image/models.py
index 08f5591a..06f45bad 100644
--- a/ereuse_devicehub/resources/image/models.py
+++ b/ereuse_devicehub/resources/image/models.py
@@ -1,6 +1,7 @@
 from uuid import uuid4
 
-from sqlalchemy import BigInteger, Column, Enum as DBEnum, ForeignKey, Unicode
+from citext import CIText
+from sqlalchemy import BigInteger, Column, Enum as DBEnum, ForeignKey
 from sqlalchemy.dialects.postgresql import UUID
 from sqlalchemy.orm import backref, relationship
 from sqlalchemy.util import OrderedSet
@@ -9,7 +10,7 @@ from teal.db import CASCADE_OWN
 from ereuse_devicehub.db import db
 from ereuse_devicehub.resources.device.models import Device
 from ereuse_devicehub.resources.enums import ImageMimeTypes, Orientation
-from ereuse_devicehub.resources.models import STR_BIG_SIZE, Thing
+from ereuse_devicehub.resources.models import Thing
 
 
 class ImageList(Thing):
@@ -26,7 +27,7 @@ class ImageList(Thing):
 
 class Image(Thing):
     id = db.Column(UUID(as_uuid=True), primary_key=True, default=uuid4)
-    name = Column(Unicode(STR_BIG_SIZE), default='', nullable=False)
+    name = Column(CIText(), default='', nullable=False)
     content = db.Column(db.LargeBinary, nullable=False)
     file_format = db.Column(DBEnum(ImageMimeTypes), nullable=False)
     orientation = db.Column(DBEnum(Orientation), nullable=False)
diff --git a/ereuse_devicehub/resources/lot/models.py b/ereuse_devicehub/resources/lot/models.py
index 930288db..678f91bf 100644
--- a/ereuse_devicehub/resources/lot/models.py
+++ b/ereuse_devicehub/resources/lot/models.py
@@ -1,6 +1,7 @@
 import uuid
 from datetime import datetime
 
+from citext import CIText
 from flask import g
 from sqlalchemy import TEXT
 from sqlalchemy.dialects.postgresql import UUID
@@ -11,13 +12,13 @@ from teal.db import UUIDLtree
 
 from ereuse_devicehub.db import db
 from ereuse_devicehub.resources.device.models import Device
-from ereuse_devicehub.resources.models import STR_SIZE, Thing
+from ereuse_devicehub.resources.models import Thing
 from ereuse_devicehub.resources.user.models import User
 
 
 class Lot(Thing):
     id = db.Column(UUID(as_uuid=True), primary_key=True)  # uuid is generated on init by default
-    name = db.Column(db.Unicode(STR_SIZE), nullable=False)
+    name = db.Column(CIText(), nullable=False)
     closed = db.Column(db.Boolean, default=False, nullable=False)
     closed.comment = """
             A closed lot cannot be modified anymore.
diff --git a/ereuse_devicehub/resources/lot/schemas.py b/ereuse_devicehub/resources/lot/schemas.py
index d0c723a3..9bfa0fd1 100644
--- a/ereuse_devicehub/resources/lot/schemas.py
+++ b/ereuse_devicehub/resources/lot/schemas.py
@@ -1,4 +1,5 @@
 from marshmallow import fields as f
+from teal.marshmallow import SanitizedStr
 
 from ereuse_devicehub.marshmallow import NestedOn
 from ereuse_devicehub.resources.device.schemas import Device
@@ -9,7 +10,7 @@ from ereuse_devicehub.resources.schemas import Thing
 
 class Lot(Thing):
     id = f.UUID(dump_only=True)
-    name = f.String(validate=f.validate.Length(max=STR_SIZE), required=True)
+    name = SanitizedStr(validate=f.validate.Length(max=STR_SIZE), required=True)
     closed = f.Boolean(missing=False, description=m.Lot.closed.comment)
     devices = NestedOn(Device, many=True, dump_only=True)
     children = NestedOn('Lot', many=True, dump_only=True)
diff --git a/ereuse_devicehub/resources/tag/__init__.py b/ereuse_devicehub/resources/tag/__init__.py
index 5d9a1af5..8a01852f 100644
--- a/ereuse_devicehub/resources/tag/__init__.py
+++ b/ereuse_devicehub/resources/tag/__init__.py
@@ -3,7 +3,7 @@ import pathlib
 
 from click import argument, option
 from ereuse_utils import cli
-from teal.resource import Resource
+from teal.resource import Converters, Resource
 from teal.teal import Teal
 
 from ereuse_devicehub.db import db
@@ -16,6 +16,7 @@ from ereuse_devicehub.resources.tag.view import TagDeviceView, TagView, get_devi
 class TagDef(Resource):
     SCHEMA = schema.Tag
     VIEW = TagView
+    ID_CONVERTER = Converters.lower
 
     ORG_H = 'The name of an existing organization in the DB. '
     'By default the organization operating this Devicehub.'
diff --git a/ereuse_devicehub/resources/tag/model.py b/ereuse_devicehub/resources/tag/model.py
index f7da86fb..465e073d 100644
--- a/ereuse_devicehub/resources/tag/model.py
+++ b/ereuse_devicehub/resources/tag/model.py
@@ -3,7 +3,7 @@ from contextlib import suppress
 from sqlalchemy import BigInteger, Column, ForeignKey, Unicode, UniqueConstraint
 from sqlalchemy.dialects.postgresql import UUID
 from sqlalchemy.orm import backref, relationship, validates
-from teal.db import DB_CASCADE_SET_NULL, Query, URL
+from teal.db import DB_CASCADE_SET_NULL, Query, URL, check_lower
 from teal.marshmallow import ValidationError
 
 from ereuse_devicehub.resources.agent.models import Organization
@@ -12,7 +12,7 @@ from ereuse_devicehub.resources.models import Thing
 
 
 class Tag(Thing):
-    id = Column(Unicode(), primary_key=True)
+    id = Column(Unicode(), check_lower('id'), primary_key=True)
     id.comment = """The ID of the tag."""
     org_id = Column(UUID(as_uuid=True),
                     ForeignKey(Organization.id),
@@ -37,7 +37,7 @@ class Tag(Thing):
                           backref=backref('tags', lazy=True, collection_class=set),
                           primaryjoin=Device.id == device_id)
     """The device linked to this tag."""
-    secondary = Column(Unicode())
+    secondary = Column(Unicode(), check_lower('secondary'))
     secondary.comment = """
         A secondary identifier for this tag. It has the same
         constraints as the main one. Only needed in special cases.
diff --git a/ereuse_devicehub/resources/tag/schema.py b/ereuse_devicehub/resources/tag/schema.py
index ec6d0cb4..f41532df 100644
--- a/ereuse_devicehub/resources/tag/schema.py
+++ b/ereuse_devicehub/resources/tag/schema.py
@@ -1,6 +1,5 @@
-from marshmallow.fields import String
 from sqlalchemy.util import OrderedSet
-from teal.marshmallow import URL
+from teal.marshmallow import SanitizedStr, URL
 
 from ereuse_devicehub.marshmallow import NestedOn
 from ereuse_devicehub.resources.agent.schemas import Organization
@@ -15,11 +14,12 @@ def without_slash(x: str) -> bool:
 
 
 class Tag(Thing):
-    id = String(description=m.Tag.id.comment,
-                validator=without_slash,
-                required=True)
+    id = SanitizedStr(lower=True,
+                      description=m.Tag.id.comment,
+                      validator=without_slash,
+                      required=True)
     provider = URL(description=m.Tag.provider.comment,
                    validator=without_slash)
     device = NestedOn(Device, dump_only=True)
     org = NestedOn(Organization, collection_class=OrderedSet, only_query='id')
-    secondary = String(description=m.Tag.secondary.comment)
+    secondary = SanitizedStr(lower=True, description=m.Tag.secondary.comment)
diff --git a/ereuse_devicehub/resources/user/schemas.py b/ereuse_devicehub/resources/user/schemas.py
index af47ff0e..e60ff1f8 100644
--- a/ereuse_devicehub/resources/user/schemas.py
+++ b/ereuse_devicehub/resources/user/schemas.py
@@ -2,6 +2,7 @@ from base64 import b64encode
 
 from marshmallow import post_dump
 from marshmallow.fields import Email, String, UUID
+from teal.marshmallow import SanitizedStr
 
 from ereuse_devicehub.marshmallow import NestedOn
 from ereuse_devicehub.resources.agent.schemas import Individual
@@ -11,9 +12,9 @@ from ereuse_devicehub.resources.schemas import Thing
 class User(Thing):
     id = UUID(dump_only=True)
     email = Email(required=True)
-    password = String(load_only=True, required=True)
+    password = SanitizedStr(load_only=True, required=True)
     individuals = NestedOn(Individual, many=True, dump_only=True)
-    name = String()
+    name = SanitizedStr()
     token = String(dump_only=True,
                    description='Use this token in an Authorization header to access the app.'
                                'The token can change overtime.')
diff --git a/examples/create-db.sh b/examples/create-db.sh
index d178f005..b74fa7b0 100644
--- a/examples/create-db.sh
+++ b/examples/create-db.sh
@@ -6,3 +6,4 @@ psql -d $1 -c "CREATE USER dhub WITH PASSWORD 'ereuse';" # Create user Devicehub
 psql -d $1 -c "GRANT ALL PRIVILEGES ON DATABASE $1 TO dhub;" # Give access to the db
 psql -d $1 -c "CREATE EXTENSION pgcrypto SCHEMA public;" # Enable pgcrypto
 psql -d $1 -c "CREATE EXTENSION ltree SCHEMA public;" # Enable ltree
+psql -d $1 -c "CREATE EXTENSION citext SCHEMA public;" # Enable citext
diff --git a/requirements.txt b/requirements.txt
index 2939b19b..b612d4e8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,6 +26,7 @@ requests==2.19.1
 requests-mock==1.5.2
 SQLAlchemy==1.2.11
 SQLAlchemy-Utils==0.33.3
-teal==0.2.0a19
+teal==0.2.0a20
 webargs==4.0.0
 Werkzeug==0.14.1
+sqlalchemy-citext==1.3.post0
diff --git a/setup.py b/setup.py
index c78fcd43..83ae609c 100644
--- a/setup.py
+++ b/setup.py
@@ -34,7 +34,7 @@ setup(
     long_description=long_description,
     long_description_content_type='text/markdown',
     install_requires=[
-        'teal>=0.2.0a19',  # teal always first
+        'teal>=0.2.0a20',  # teal always first
         'click',
         'click-spinner',
         'ereuse-rate==0.0.2',
@@ -46,6 +46,7 @@ setup(
         'PyYAML',
         'requests',
         'requests-toolbelt',
+        'sqlalchemy-citext',
         'sqlalchemy-utils[password, color, phone]',
     ],
     extras_require={
diff --git a/tests/conftest.py b/tests/conftest.py
index bdf48fa1..7dee4a49 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -28,7 +28,7 @@ class TestConfig(DevicehubConfig):
     SCHEMA = 'test'
     TESTING = True
     ORGANIZATION_NAME = 'FooOrg'
-    ORGANIZATION_TAX_ID = 'FooOrgId'
+    ORGANIZATION_TAX_ID = 'foo-org-id'
 
 
 @pytest.fixture(scope='module')
diff --git a/tests/test_agent.py b/tests/test_agent.py
index a1561c6c..d379c7b5 100644
--- a/tests/test_agent.py
+++ b/tests/test_agent.py
@@ -18,7 +18,7 @@ from tests.conftest import app_context, create_user
 def test_agent():
     """Tests creating an person."""
     person = Person(name='Timmy',
-                    tax_id='XYZ',
+                    tax_id='xyz',
                     country=Country.ES,
                     telephone=PhoneNumber('+34666666666'),
                     email='foo@bar.com')
@@ -27,7 +27,7 @@ def test_agent():
 
     p = schemas.Person().dump(person)
     assert p['name'] == person.name == 'Timmy'
-    assert p['taxId'] == person.tax_id == 'XYZ'
+    assert p['taxId'] == person.tax_id == 'xyz'
     assert p['country'] == person.country.name == 'ES'
     assert p['telephone'] == person.telephone.international == '+34 666 66 66 66'
     assert p['email'] == person.email == 'foo@bar.com'
@@ -50,7 +50,7 @@ def test_system():
 def test_organization():
     """Tests creating an organization."""
     org = Organization(name='ACME',
-                       tax_id='XYZ',
+                       tax_id='xyz',
                        country=Country.ES,
                        email='contact@acme.com')
     db.session.add(org)
@@ -58,7 +58,7 @@ def test_organization():
 
     o = schemas.Organization().dump(org)
     assert o['name'] == org.name == 'ACME'
-    assert o['taxId'] == org.tax_id == 'XYZ'
+    assert o['taxId'] == org.tax_id == 'xyz'
     assert org.country.name == o['country'] == 'ES'
 
 
@@ -123,10 +123,10 @@ def test_assign_individual_user():
 @pytest.mark.usefixtures(app_context.__name__)
 def test_create_organization_main_method(app: Devicehub):
     org_def = app.resources[models.Organization.t]  # type: OrganizationDef
-    o = org_def.create_org('ACME', tax_id='FOO', country='ES')
+    o = org_def.create_org('ACME', tax_id='foo', country='ES')
     org = models.Agent.query.filter_by(id=o['id']).one()  # type: Organization
     assert org.name == o['name'] == 'ACME'
-    assert org.tax_id == o['taxId'] == 'FOO'
+    assert org.tax_id == o['taxId'] == 'foo', 'FOO must be converted to lowercase'
     assert org.country.name == o['country'] == 'ES'
 
 
diff --git a/tests/test_device.py b/tests/test_device.py
index fdf45a00..fa1ff754 100644
--- a/tests/test_device.py
+++ b/tests/test_device.py
@@ -201,7 +201,7 @@ def test_sync_run_components_none():
 
 
 @pytest.mark.usefixtures(conftest.app_context.__name__)
-def test_sync_execute_register_Desktop_new_Desktop_no_tag():
+def test_sync_execute_register_desktop_new_Desktop_no_tag():
     """
     Syncs a new Desktop with HID and without a tag, creating it.
     :return:
@@ -213,7 +213,7 @@ def test_sync_execute_register_Desktop_new_Desktop_no_tag():
 
 
 @pytest.mark.usefixtures(conftest.app_context.__name__)
-def test_sync_execute_register_Desktop_existing_no_tag():
+def test_sync_execute_register_desktop_existing_no_tag():
     """
     Syncs an existing Desktop with HID and without a tag.
     """
@@ -229,7 +229,7 @@ def test_sync_execute_register_Desktop_existing_no_tag():
 
 
 @pytest.mark.usefixtures(conftest.app_context.__name__)
-def test_sync_execute_register_Desktop_no_hid_no_tag():
+def test_sync_execute_register_desktop_no_hid_no_tag():
     """
     Syncs a Desktop without HID and no tag.
 
@@ -243,18 +243,18 @@ def test_sync_execute_register_Desktop_no_hid_no_tag():
 
 
 @pytest.mark.usefixtures(conftest.app_context.__name__)
-def test_sync_execute_register_Desktop_tag_not_linked():
+def test_sync_execute_register_desktop_tag_not_linked():
     """
     Syncs a new Desktop with HID and a non-linked tag.
 
     It is OK if the tag was not linked, it will be linked in this process.
     """
-    tag = Tag(id='FOO')
+    tag = Tag(id='foo')
     db.session.add(tag)
     db.session.commit()
 
     # Create a new transient non-db object
-    pc = Desktop(**conftest.file('pc-components.db')['device'], tags=OrderedSet([Tag(id='FOO')]))
+    pc = Desktop(**conftest.file('pc-components.db')['device'], tags=OrderedSet([Tag(id='foo')]))
     returned_pc = Sync().execute_register(pc)
     assert returned_pc == pc
     assert tag.device == pc, 'Tag has to be linked'
diff --git a/tests/test_event.py b/tests/test_event.py
index 1ef9fdb1..a116a148 100644
--- a/tests/test_event.py
+++ b/tests/test_event.py
@@ -89,7 +89,7 @@ def test_test_data_storage():
         error=False,
         elapsed=timedelta(minutes=25),
         length=TestHardDriveLength.Short,
-        status='OK!',
+        status='ok!',
         lifetime=timedelta(days=120)
     )
     db.session.add(test)
@@ -199,13 +199,13 @@ def test_live():
     db_live = models.Live(ip=ipaddress.ip_address('79.147.10.10'),
                           subdivision_confidence=84,
                           subdivision=Subdivision['ES-CA'],
-                          city='Barcelona',
+                          city='barcelona',
                           city_confidence=20,
-                          isp='ACME',
+                          isp='acme',
                           device=Desktop(serial_number='sn1', model='ml1', manufacturer='mr1',
                                          chassis=ComputerChassis.Docking),
-                          organization='ACME1',
-                          organization_type='ACME1bis')
+                          organization='acme1',
+                          organization_type='acme1bis')
     db.session.add(db_live)
     db.session.commit()
     client = UserClient(app, 'foo@foo.com', 'foo', response_wrapper=app.response_class)
diff --git a/tests/test_snapshot.py b/tests/test_snapshot.py
index 3126c75a..8acf78c0 100644
--- a/tests/test_snapshot.py
+++ b/tests/test_snapshot.py
@@ -352,7 +352,7 @@ def assert_similar_device(device1: dict, device2: dict):
     assert isinstance(device1, dict) and device1
     assert isinstance(device2, dict) and device2
     for key in 'serialNumber', 'model', 'manufacturer', 'type':
-        assert device1.get(key, None) == device2.get(key, None)
+        assert device1.get(key, '').lower() == device2.get(key, '').lower()
 
 
 def assert_similar_components(components1: List[dict], components2: List[dict]):
diff --git a/tests/test_tag.py b/tests/test_tag.py
index 1305aaf9..e0044d18 100644
--- a/tests/test_tag.py
+++ b/tests/test_tag.py
@@ -21,7 +21,7 @@ from tests import conftest
 @pytest.mark.usefixtures(conftest.app_context.__name__)
 def test_create_tag():
     """Creates a tag specifying a custom organization."""
-    org = Organization(name='Bar', tax_id='BarTax')
+    org = Organization(name='bar', tax_id='bartax')
     tag = Tag(id='bar-1', org=org, provider=URL('http://foo.bar'))
     db.session.add(tag)
     db.session.commit()
@@ -148,7 +148,7 @@ def test_tag_create_etags_cli(app: Devicehub, user: UserClient):
                   catch_exceptions=False)
     with app.app_context():
         tag = Tag.query.one()  # type: Tag
-        assert tag.id == 'DT-BARBAR'
+        assert tag.id == 'dt-barbar'
         assert tag.secondary == 'foo'
         assert tag.provider == URL('https://t.ereuse.org')
 
@@ -167,8 +167,13 @@ def test_tag_manual_link(app: Devicehub, user: UserClient):
 
     # Device already linked
     # Just returns an OK to conform to PUT as anything changes
+
     user.put({}, res=Tag, item='foo-sec/device/{}'.format(desktop_id), status=204)
 
+    # Secondary IDs are case insensitive
+    user.put({}, res=Tag, item='FOO-BAR/device/{}'.format(desktop_id), status=204)
+    user.put({}, res=Tag, item='FOO-SEC/device/{}'.format(desktop_id), status=204)
+
     # cannot link to another device when already linked
     user.put({}, res=Tag, item='foo-bar/device/99', status=LinkedToAnotherDevice)
 
diff --git a/tests/test_workbench.py b/tests/test_workbench.py
index d7abee31..116882fb 100644
--- a/tests/test_workbench.py
+++ b/tests/test_workbench.py
@@ -150,9 +150,9 @@ def test_real_eee_1001pxd(user: UserClient):
     pc, _ = user.get(res=Device, item=snapshot['device']['id'])
     assert pc['type'] == 'Laptop'
     assert pc['chassis'] == 'Netbook'
-    assert pc['model'] == '1001PXD'
-    assert pc['serialNumber'] == 'B8OAAS048286'
-    assert pc['manufacturer'] == 'ASUSTeK Computer INC.'
+    assert pc['model'] == '1001pxd'
+    assert pc['serialNumber'] == 'b8oaas048286'
+    assert pc['manufacturer'] == 'asustek computer inc.'
     assert pc['hid'] == 'asustek_computer_inc-b8oaas048286-1001pxd'
     assert pc['tags'] == []
     components = snapshot['components']
@@ -170,7 +170,7 @@ def test_real_eee_1001pxd(user: UserClient):
     assert cpu['threads'] == 1
     assert cpu['speed'] == 1.667
     assert 'hid' not in cpu
-    assert cpu['model'] == 'Intel Atom CPU N455 @ 1.66GHz'
+    assert cpu['model'] == 'intel atom cpu n455 @ 1.66ghz'
     cpu, _ = user.get(res=Device, item=cpu['id'])
     events = cpu['events']
     sysbench = next(e for e in events if e['type'] == em.BenchmarkProcessorSysbench.t)
@@ -188,8 +188,8 @@ def test_real_eee_1001pxd(user: UserClient):
     assert em.Snapshot.t in event_types
     assert len(events) == 5
     gpu = components[3]
-    assert gpu['model'] == 'Atom Processor D4xx/D5xx/N4xx/N5xx Integrated Graphics Controller'
-    assert gpu['manufacturer'] == 'Intel Corporation'
+    assert gpu['model'] == 'atom processor d4xx/d5xx/n4xx/n5xx integrated graphics controller'
+    assert gpu['manufacturer'] == 'intel corporation'
     assert gpu['memory'] == 256
     gpu, _ = user.get(res=Device, item=gpu['id'])
     event_types = tuple(e['type'] for e in gpu['events'])
@@ -198,9 +198,9 @@ def test_real_eee_1001pxd(user: UserClient):
     assert em.Snapshot.t in event_types
     assert len(event_types) == 3
     sound = components[4]
-    assert sound['model'] == 'NM10/ICH7 Family High Definition Audio Controller'
+    assert sound['model'] == 'nm10/ich7 family high definition audio controller'
     sound = components[5]
-    assert sound['model'] == 'USB 2.0 UVC VGA WebCam'
+    assert sound['model'] == 'usb 2.0 uvc vga webcam'
     ram = components[6]
     assert ram['interface'] == 'DDR2'
     assert ram['speed'] == 667