diff --git a/ereuse_devicehub/dummy/dummy.py b/ereuse_devicehub/dummy/dummy.py
index ed402141..162ccf56 100644
--- a/ereuse_devicehub/dummy/dummy.py
+++ b/ereuse_devicehub/dummy/dummy.py
@@ -188,8 +188,8 @@ class Dummy:
         # For netbook: to preapre -> torepair -> to dispose -> disposed
         print('⭐ Done.')
 
-    def user_client(self, email: str, password: str, name: str, ethereum_address: str):
-        user = User(email=email, password=password, ethereum_address=ethereum_address)
+    def user_client(self, email: str, password: str, name: str:
+        user = User(email=email, password=password)
 
         user.individuals.add(Person(name=name))
         db.session.add(user)
diff --git a/ereuse_devicehub/migrations/versions/eca457d8b2a4_change_deliverynote.py b/ereuse_devicehub/migrations/versions/eca457d8b2a4_change_deliverynote.py
index 24f4a161..e8bcc663 100644
--- a/ereuse_devicehub/migrations/versions/eca457d8b2a4_change_deliverynote.py
+++ b/ereuse_devicehub/migrations/versions/eca457d8b2a4_change_deliverynote.py
@@ -31,7 +31,14 @@ def upgrade():
     op.alter_column('computer', 'deposit', new_column_name='amount', schema=f'{get_inv()}')
     op.alter_column('lot', 'deposit', new_column_name='amount', schema=f'{get_inv()}')
     op.drop_column('computer', 'deliverynote_address', schema=f'{get_inv()}')
+    op.drop_column('computer', 'ethereum_address', schema=f'{get_inv()}')
+    op.drop_column('user', 'ethereum_address', schema='common')
     op.drop_column('lot', 'deliverynote_address', schema=f'{get_inv()}')
+
+    op.drop_column('lot', 'receiver_address', schema=f'{get_inv()}')
+    op.add_column('lot', sa.Column('receiver_address', citext.CIText(), nullable=True), schema=f'{get_inv()}')
+    op.add_column('lot', sa.ForeignKeyConstraint(['receiver_address'], ['common.user.email'],), schema=f'{get_inv()}')
+
     op.drop_table('proof_function', schema=f'{get_inv()}')
     op.drop_table('proof_data_wipe', schema=f'{get_inv()}')
     op.drop_table('proof_transfer', schema=f'{get_inv()}')
@@ -45,10 +52,20 @@ def upgrade():
 def downgrade():
     op.add_column('deliverynote', sa.Column('ethereum_address', citext.CIText(), nullable=True), schema=f'{get_inv()}')
     op.alter_column('deliverynote', 'amount', new_column_name='deposit', schema=f'{get_inv()}')
-    op.alter_column('computer', 'amount', new_column_name='deposit', schema=f'{get_inv()}')
-    op.alter_column('lot', 'amount', new_column_name='deposit', schema=f'{get_inv()}')
     op.add_column('computer', sa.Column('deliverynote_address', citext.CIText(), nullable=True), schema=f'{get_inv()}')
     op.add_column('lot', sa.Column('deliverynote_address', citext.CIText(), nullable=True), schema=f'{get_inv()}')
+
+    # =====
+    op.alter_column('computer', 'amount', new_column_name='deposit', schema=f'{get_inv()}')
+    op.alter_column('lot', 'amount', new_column_name='deposit', schema=f'{get_inv()}')
+
+    # =====
+    op.add_column('computer', sa.Column('ethereum_address', citext.CIText(), nullable=True), schema=f'{get_inv()}')
+    op.add_column('user', sa.Column('ethereum_address', citext.CIText(), nullable=True), schema='common')
+    op.add_column('lot', sa.Column('receiver_address', citext.CIText(), nullable=True), schema=f'{get_inv()}')
+    op.add_column('lot', sa.ForeignKeyConstraint(['receiver_address'], ['common.user.ethereum_address'],), schema=f'{get_inv()}')
+
+    # =====
     op.create_table('proof',
                     sa.Column('updated', sa.TIMESTAMP(timezone=True), server_default=sa.text('CURRENT_TIMESTAMP'),
                               nullable=False,
diff --git a/ereuse_devicehub/resources/deliverynote/views.py b/ereuse_devicehub/resources/deliverynote/views.py
index 321f7ad9..15ceaa4b 100644
--- a/ereuse_devicehub/resources/deliverynote/views.py
+++ b/ereuse_devicehub/resources/deliverynote/views.py
@@ -35,13 +35,6 @@ class DeliverynoteView(View):
         # computers = [x for x in dlvnote.transferred_devices if isinstance(x, Computer)]
         for key, value in d.items():
             setattr(dlvnote, key, value)
-            # Transalate ethereum_address attribute
-            # devKey = key
-            # if key == 'ethereum_address':
-            #     devKey = 'deliverynote_address'
-            # if devKey in device_fields:
-            #     for dev in computers:
-            #         setattr(dev, devKey, value)
 
         db.session.commit()
         return Response(status=204)
diff --git a/ereuse_devicehub/resources/device/models.py b/ereuse_devicehub/resources/device/models.py
index d5503d13..a9efc105 100644
--- a/ereuse_devicehub/resources/device/models.py
+++ b/ereuse_devicehub/resources/device/models.py
@@ -471,7 +471,6 @@ class Computer(Device):
 
     It is a subset of the Linux definition of DMI / DMI decode.
     """
-    ethereum_address = Column(CIText(), unique=True, default=None)
     amount = Column(Integer, check_range('amount', min=0, max=100), default=0)
     owner_id = db.Column(UUID(as_uuid=True),
                          db.ForeignKey(User.id),
diff --git a/ereuse_devicehub/resources/device/models.pyi b/ereuse_devicehub/resources/device/models.pyi
index ba1e2fd8..837a737f 100644
--- a/ereuse_devicehub/resources/device/models.pyi
+++ b/ereuse_devicehub/resources/device/models.pyi
@@ -144,7 +144,7 @@ class Computer(DisplayMixin, Device):
     amount = ...  # type: Column
     owner_address = ...  # type: Column
     transfer_state = ...  # type: Column
-    receiver_address = ...  # type: Column
+    receiver_id = ...  # uuid: Column
 
     def __init__(self, **kwargs) -> None:
         super().__init__(**kwargs)
diff --git a/ereuse_devicehub/resources/device/schemas.py b/ereuse_devicehub/resources/device/schemas.py
index ac2d117d..706b7e03 100644
--- a/ereuse_devicehub/resources/device/schemas.py
+++ b/ereuse_devicehub/resources/device/schemas.py
@@ -123,7 +123,6 @@ class Computer(Device):
                        dump_only=True,
                        collection_class=set,
                        description=m.Computer.privacy.__doc__)
-    ethereum_address = SanitizedStr(validate=f.validate.Length(max=42))
     amount = Integer(validate=f.validate.Range(min=0, max=100),
                       description=m.Computer.amount.__doc__)
     # author_id = NestedOn(s_user.User,only_query='author_id')
diff --git a/ereuse_devicehub/resources/device/views.py b/ereuse_devicehub/resources/device/views.py
index 83e16de7..3dde5e3b 100644
--- a/ereuse_devicehub/resources/device/views.py
+++ b/ereuse_devicehub/resources/device/views.py
@@ -106,7 +106,7 @@ class DeviceView(View):
             resource_def = app.resources['Computer']
             # TODO check how to handle the 'actions_one'
             patch_schema = resource_def.SCHEMA(
-                only=['ethereum_address', 'transfer_state', 'actions_one'], partial=True)
+                only=['transfer_state', 'actions_one'], partial=True)
             json = request.get_json(schema=patch_schema)
             # TODO check how to handle the 'actions_one'
             json.pop('actions_one')
diff --git a/ereuse_devicehub/resources/lot/models.py b/ereuse_devicehub/resources/lot/models.py
index 5022b24e..f8a9066b 100644
--- a/ereuse_devicehub/resources/lot/models.py
+++ b/ereuse_devicehub/resources/lot/models.py
@@ -72,9 +72,10 @@ class Lot(Thing):
     transfer_state = db.Column(IntEnum(TransferState), default=TransferState.Initial, nullable=False)
     transfer_state.comment = TransferState.__doc__
     receiver_address = db.Column(CIText(),
-                                 db.ForeignKey(User.ethereum_address),
-                                 nullable=True)
-    receiver = db.relationship(User, primaryjoin=receiver_address == User.ethereum_address)
+                                 db.ForeignKey(User.email),
+                                 nullable=False,
+                                 default=lambda: g.user.email)
+    receiver = db.relationship(User, primaryjoin=receiver_address == User.email)
 
     def __init__(self, name: str, closed: bool = closed.default.arg,
                  description: str = None) -> None:
diff --git a/ereuse_devicehub/resources/user/models.py b/ereuse_devicehub/resources/user/models.py
index 98a25598..0ab670c8 100644
--- a/ereuse_devicehub/resources/user/models.py
+++ b/ereuse_devicehub/resources/user/models.py
@@ -25,11 +25,10 @@ class User(Thing):
                                   backref=db.backref('users', lazy=True, collection_class=set),
                                   secondary=lambda: UserInventory.__table__,
                                   collection_class=set)
-    ethereum_address = Column(CIText(), unique=True, default=None)
 
     # todo set restriction that user has, at least, one active db
 
-    def __init__(self, email, password=None, ethereum_address=None, inventories=None) -> None:
+    def __init__(self, email, password=None, inventories=None) -> None:
         """Creates an user.
         :param email:
         :param password:
@@ -38,7 +37,7 @@ class User(Thing):
         inventory.
         """
         inventories = inventories or {Inventory.current}
-        super().__init__(email=email, password=password, ethereum_address=ethereum_address, inventories=inventories)
+        super().__init__(email=email, password=password, inventories=inventories)
 
     def __repr__(self) -> str:
         return '<User {0.email}>'.format(self)
@@ -52,11 +51,6 @@ class User(Thing):
         """The individual associated for this database, or None."""
         return next(iter(self.individuals), None)
 
-    @property
-    def get_ethereum_address(self):
-        """The ethereum address in Blockchain, or None."""
-        return next(iter(self.ethereum_address), None)
-
 
 class UserInventory(db.Model):
     """Relationship between users and their inventories."""
diff --git a/ereuse_devicehub/resources/user/models.pyi b/ereuse_devicehub/resources/user/models.pyi
index 15874464..6e8d03b9 100644
--- a/ereuse_devicehub/resources/user/models.pyi
+++ b/ereuse_devicehub/resources/user/models.pyi
@@ -17,7 +17,6 @@ class User(Thing):
     password = ...  # type: Column
     token = ...  # type: Column
     inventories = ...  # type: relationship
-    ethereum_address = ...  # type: Column
 
     def __init__(self, email: str, password: str = None,
                  inventories: Set[Inventory] = None) -> None:
@@ -28,7 +27,6 @@ class User(Thing):
         self.individuals = ...  # type: Set[Individual]
         self.token = ...  # type: UUID
         self.inventories = ...  # type: Set[Inventory]
-        self.ethereum_address = ...  # type: str
 
     @property
     def individual(self) -> Union[Individual, None]:
diff --git a/ereuse_devicehub/resources/user/schemas.py b/ereuse_devicehub/resources/user/schemas.py
index 00d022ad..e8d0d768 100644
--- a/ereuse_devicehub/resources/user/schemas.py
+++ b/ereuse_devicehub/resources/user/schemas.py
@@ -19,7 +19,6 @@ class User(Thing):
                    description='Use this token in an Authorization header to access the app.'
                                'The token can change overtime.')
     inventories = NestedOn(Inventory, many=True, dump_only=True)
-    ethereum_address = String(description='User identifier address inside the Blockchain')
 
     def __init__(self,
                  only=None,
diff --git a/ereuse_devicehub/resources/user/views.py b/ereuse_devicehub/resources/user/views.py
index 19624b80..7053eea7 100644
--- a/ereuse_devicehub/resources/user/views.py
+++ b/ereuse_devicehub/resources/user/views.py
@@ -15,7 +15,7 @@ class UserView(View):
 
 def login():
     # We use custom schema as we only want to parse a subset of user
-    user_s = g.resource_def.SCHEMA(only=('email', 'password', 'ethereum_address'))  # type: UserS
+    user_s = g.resource_def.SCHEMA(only=('email', 'password'))  # type: UserS
     # noinspection PyArgumentList
     u = request.get_json(schema=user_s)
     user = User.query.filter_by(email=u['email']).one_or_none()