diff --git a/.gitignore b/.gitignore
index bed364c2..e5012c76 100644
--- a/.gitignore
+++ b/.gitignore
@@ -109,4 +109,3 @@ ENV/
 .vscode/
 .DS_Store
 /app.py
-
diff --git a/ereuse_devicehub/resources/device/models.py b/ereuse_devicehub/resources/device/models.py
index cb04f425..2cc5333d 100644
--- a/ereuse_devicehub/resources/device/models.py
+++ b/ereuse_devicehub/resources/device/models.py
@@ -20,14 +20,14 @@ from sqlalchemy_utils import ColorType
 from sqlalchemy.dialects.postgresql import UUID
 from stdnum import imei, meid
 from teal.db import CASCADE_DEL, POLYMORPHIC_ID, POLYMORPHIC_ON, ResourceNotFound, URL, \
-    check_lower, check_range
+    check_lower, check_range, IntEnum
 from teal.enums import Layouts
 from teal.marshmallow import ValidationError
 from teal.resource import url_for_resource
 
 from ereuse_devicehub.db import db
 from ereuse_devicehub.resources.enums import BatteryTechnology, CameraFacing, ComputerChassis, \
-    DataStorageInterface, DisplayTech, PrinterTechnology, RamFormat, RamInterface, Severity
+    DataStorageInterface, DisplayTech, PrinterTechnology, RamFormat, RamInterface, Severity, TransferState
 from ereuse_devicehub.resources.models import STR_SM_SIZE, Thing
 from ereuse_devicehub.resources.user.models import User
 
@@ -387,6 +387,13 @@ class Computer(Device):
                           nullable=False,
                           default=lambda: g.user.id)
     author = db.relationship(User, primaryjoin=author_id == User.id)
+    transfer_state = db.Column(IntEnum(TransferState), default=TransferState.Initial, nullable=False)
+    transfer_state.comment = TransferState.__doc__
+    receiver_id = db.Column(CIText(),
+                          db.ForeignKey(User.ethereum_address),
+                          nullable=True)
+    receiver = db.relationship(User, primaryjoin=receiver_id == User.ethereum_address)
+    delivery_note_address = db.Column(CIText(), nullable=True)
 
     def __init__(self, chassis, **kwargs) -> None:
         chassis = ComputerChassis(chassis)
diff --git a/ereuse_devicehub/resources/device/models.pyi b/ereuse_devicehub/resources/device/models.pyi
index 77740a76..f50a8577 100644
--- a/ereuse_devicehub/resources/device/models.pyi
+++ b/ereuse_devicehub/resources/device/models.pyi
@@ -143,13 +143,18 @@ class Computer(DisplayMixin, Device):
     chassis = ...  # type: Column
     deposit = ... # type: Column
     author_id = ... # type: Column
+    transfer_state = ... # type: Column
+    receiver_id = ... # type: Column
+    delivery_note_address = ... # type: Column
 
     def __init__(self, **kwargs) -> None:
         super().__init__(**kwargs)
         self.components = ...  # type: Set[Component]
         self.actions_parent = ...  # type: Set[e.Action]
         self.chassis = ...  # type: ComputerChassis
-        self.author_id = ... 
+        self.author_id = ... # type: UUID
+        self.transfer_state = ...
+        self.receiver_id = ... # type: str
     
     @property
     def actions(self) -> List:
diff --git a/ereuse_devicehub/resources/device/schemas.py b/ereuse_devicehub/resources/device/schemas.py
index ec9b85a2..36f96698 100644
--- a/ereuse_devicehub/resources/device/schemas.py
+++ b/ereuse_devicehub/resources/device/schemas.py
@@ -1,6 +1,6 @@
 import datetime
 
-from marshmallow import post_load, pre_load
+from marshmallow import post_load, pre_load, fields as f
 from marshmallow.fields import Boolean, Date, DateTime, Float, Integer, List, Str, String, UUID
 from marshmallow.validate import Length, OneOf, Range
 from sqlalchemy.util import OrderedSet
@@ -128,6 +128,9 @@ class Computer(Device):
     # author_id = NestedOn(s_user.User,only_query='author_id')
     author_id = UUID(dump_only=True,
                                 data_key='author_id')
+    transfer_state = EnumField(enums.TransferState, description=m.Computer.transfer_state.comment)
+    receiver_id = SanitizedStr(validate=f.validate.Length(max=42))
+                            
 
 class Desktop(Computer):
     __doc__ = m.Desktop.__doc__