diff --git a/ereuse_devicehub/forms.py b/ereuse_devicehub/forms.py
index 68485f33..4980b41e 100644
--- a/ereuse_devicehub/forms.py
+++ b/ereuse_devicehub/forms.py
@@ -141,6 +141,12 @@ class SanitizationEntityForm(FlaskForm):
         if not is_valid:
             return False
 
+        extensions = ["jpg", "jpeg", "png", "gif", "svg"]
+        if self.logo.data.lower().split(".")[-1] not in extensions:
+            txt = "Error in Url field - accepted only .PNG, .JPG and .GIF. extensions"
+            self.logo.errors = [txt]
+            return False
+
         return True
 
     def save(self, commit=True):
diff --git a/ereuse_devicehub/inventory/forms.py b/ereuse_devicehub/inventory/forms.py
index a4504f17..dff4e87e 100644
--- a/ereuse_devicehub/inventory/forms.py
+++ b/ereuse_devicehub/inventory/forms.py
@@ -1561,7 +1561,17 @@ class CustomerDetailsForm(FlaskForm):
 
     def validate(self, extra_validators=None):
         is_valid = super().validate(extra_validators)
-        return is_valid
+
+        if not is_valid:
+            return is_valid
+
+        extensions = ["jpg", "jpeg", "png", "gif", "svg"]
+        if self.logo.data.lower().split(".")[-1] not in extensions:
+            txt = "Error in Url field - accepted only .PNG, .JPG and .GIF. extensions"
+            self.logo.errors = [txt]
+            return False
+
+        return True
 
     def save(self, commit=True):
         self.populate_obj(self._obj)
diff --git a/ereuse_devicehub/views.py b/ereuse_devicehub/views.py
index 915a4dc4..65cb4d3a 100644
--- a/ereuse_devicehub/views.py
+++ b/ereuse_devicehub/views.py
@@ -143,8 +143,11 @@ class SanitizationEntityView(View):
             messages.success('Sanitization data updated successfully!')
         else:
             messages.error('Error modifying Sanitization data!')
+            if form.errors:
+                for k in form.errors.keys():
+                    txt = "{}: {}".format(k, form.errors[k])
+                    messages.error(txt)
 
-        # db.session.commit()
         return flask.redirect(flask.url_for('core.user-profile'))