diff --git a/addons/point_of_sale/models/pos_session.py b/addons/point_of_sale/models/pos_session.py
index 4fa75429ed0..afe5bbf94d2 100644
--- a/addons/point_of_sale/models/pos_session.py
+++ b/addons/point_of_sale/models/pos_session.py
@@ -316,7 +316,7 @@ class PosSession(models.Model):
                 self.env.cr.rollback()
                 return self._close_session_action(balance)
 
-            self._post_statement_difference(cash_difference_before_statements)
+            self.sudo()._post_statement_difference(cash_difference_before_statements)
             if self.move_id.line_ids:
                 self.move_id.sudo().with_company(self.company_id)._post()
                 # Set the uninvoiced orders' state to 'done'
@@ -325,7 +325,7 @@ class PosSession(models.Model):
                 self.move_id.sudo().unlink()
             self.sudo().with_company(self.company_id)._reconcile_account_move_lines(data)
         else:
-            self._post_statement_difference(self.cash_register_difference)
+            self.sudo()._post_statement_difference(self.cash_register_difference)
 
         self.write({'state': 'closed'})
         return True
@@ -1479,7 +1479,7 @@ class PosSession(models.Model):
         self.opening_notes = notes
         difference = cashbox_value - self.cash_register_balance_start
         self.cash_register_balance_start = cashbox_value
-        self._post_statement_difference(difference)
+        self.sudo()._post_statement_difference(difference)
         self._post_cash_details_message('Opening', difference, notes)
 
     def _post_cash_details_message(self, state, difference, notes):