diff --git a/ereuse_devicehub/inventory/forms.py b/ereuse_devicehub/inventory/forms.py
index 863bc6a2..00fe0240 100644
--- a/ereuse_devicehub/inventory/forms.py
+++ b/ereuse_devicehub/inventory/forms.py
@@ -31,6 +31,8 @@ from ereuse_devicehub.resources.tag.model import Tag
 from ereuse_devicehub.resources.tradedocument.models import TradeDocument
 from ereuse_devicehub.resources.user.exceptions import InsufficientPermission
 from ereuse_devicehub.resources.user.models import User
+from ereuse_devicehub.resources.action.models import Trade
+from sqlalchemy import or_
 
 
 class LotDeviceForm(FlaskForm):
@@ -718,9 +720,14 @@ class TradeForm(NewActionForm):
         self.user_from.render_kw['data-email'] = g.user.email
         self.user_to.render_kw['data-email'] = g.user.email
         self._lot = (
-            Lot.query.filter(Lot.id == self.lot.data)
-            .filter(Lot.owner_id == g.user.id)
-            .one()
+            # Lot.query.filter(Lot.id == self.lot.data)
+            # .filter(Lot.owner_id == g.user.id)
+            # .one()
+            Lot.query.outerjoin(Trade)
+            .filter(Lot.id == self.lot.data)
+            .filter(or_(Trade.user_from == g.user,
+                        Trade.user_to == g.user,
+                        Lot.owner_id == g.user.id)).one()
         )
 
     def validate(self, extra_validators=None):
diff --git a/ereuse_devicehub/inventory/views.py b/ereuse_devicehub/inventory/views.py
index e43f764a..c0059183 100644
--- a/ereuse_devicehub/inventory/views.py
+++ b/ereuse_devicehub/inventory/views.py
@@ -7,6 +7,7 @@ from flask import Blueprint, g, make_response, request, url_for
 from flask.views import View
 from flask_login import current_user, login_required
 from werkzeug.exceptions import NotFound
+from sqlalchemy import or_
 
 from ereuse_devicehub import messages
 from ereuse_devicehub.inventory.forms import (
@@ -42,7 +43,10 @@ class DeviceListMix(View):
         # TODO @cayop adding filter
         # https://github.com/eReuse/devicehub-teal/blob/testing/ereuse_devicehub/resources/device/views.py#L56
         filter_types = ['Desktop', 'Laptop', 'Server']
-        lots = Lot.query.filter(Lot.owner_id == current_user.id)
+        lots = Lot.query.outerjoin(Trade) \
+            .filter(or_(Trade.user_from == g.user,
+                        Trade.user_to == g.user,
+                        Lot.owner_id == g.user.id)).distinct()
         lot = None
         tags = (
             Tag.query.filter(Tag.owner_id == current_user.id)
@@ -51,6 +55,7 @@ class DeviceListMix(View):
         )
 
         if lot_id:
+            # import pdb; pdb.set_trace()
             lot = lots.filter(Lot.id == lot_id).one()
             devices = [dev for dev in lot.devices if dev.type in filter_types]
             devices = sorted(devices, key=lambda x: x.updated, reverse=True)