diff --git a/sale.py b/sale.py
index 2021bf78a0..5975d83fb7 100644
--- a/sale.py
+++ b/sale.py
@@ -74,13 +74,11 @@ class Sale:
                 'company': self.company.id,
                 }
             values.update(dict(key))
-            with Transaction().set_user(0, set_context=True):
-                shipment = Shipment(**values)
-                shipment.moves = [m for m in grouped_moves]
-                shipment.save()
-                shipments.append(shipment)
-        with Transaction().set_user(0, set_context=True):
-            Shipment.wait(shipments)
+            shipment = Shipment(**values)
+            shipment.moves = [m for m in grouped_moves]
+            shipment.save()
+            shipments.append(shipment)
+        Shipment.wait(shipments)
         return shipments
 
 
@@ -91,12 +89,9 @@ class SaleLine:
         result = super(SaleLine, self).get_move(shipment_type)
         if (shipment_type == 'out'
                 and self.supply_on_sale):
-            with Transaction().set_user(0, set_context=True):
-                # TODO make it works in bunch
-                line = self.__class__(self.id)
-                if (line.purchase_request and line.purchase_request.customer
-                        and self.purchase_request_state != 'cancel'):
-                    return {}
+            if (self.purchase_request and self.purchase_request.customer
+                    and self.purchase_request_state != 'cancel'):
+                return {}
         return result
 
     def get_purchase_request(self):
@@ -120,14 +115,11 @@ class SaleLine:
                 or not self.product):
             return []
         moves = []
-        with Transaction().set_user(0, set_context=True):
-            # TODO make it work in bunch
-            line = self.__class__(self.id)
-            if line.purchase_request and line.purchase_request.customer:
-                if line.purchase_request.purchase_line:
-                    moves = [m
-                        for m in line.purchase_request.purchase_line.moves
-                        if m.state == 'draft' and not m.shipment]
+        if self.purchase_request and self.purchase_request.customer:
+            if self.purchase_request.purchase_line:
+                moves = [m
+                    for m in self.purchase_request.purchase_line.moves
+                    if m.state == 'draft' and not m.shipment]
         return moves
 
     @classmethod
@@ -142,7 +134,7 @@ class SaleLine:
                 added = True
         values = super(SaleLine, cls).read(ids, fields_names=fields_names)
         if 'moves' in fields_names or []:
-            with Transaction().set_user(0, set_context=True):
+            with Transaction().set_context(_check_access=False):
                 purchase_requests = PurchaseRequest.browse(
                     list(set(v['purchase_request']
                             for v in values if v['purchase_request'])))
diff --git a/stock.py b/stock.py
index 47eb6adde1..4848e4de4b 100644
--- a/stock.py
+++ b/stock.py
@@ -199,7 +199,7 @@ class ShipmentDrop(Workflow, ModelSQL, ModelView):
         for shipments, values in zip(actions, actions):
             if values.get('state', '') not in ('done', 'cancel'):
                 continue
-            with Transaction().set_user(0, set_context=True):
+            with Transaction().set_context(_check_access=False):
                 purchases = set()
                 move_ids = [m.id for s in shipments for m in s.moves]
                 purchase_lines = PurchaseLine.search([