diff --git a/addons/hr_expense/models/hr_expense.py b/addons/hr_expense/models/hr_expense.py
index a0948a43ebcc..41b6d534d57b 100644
--- a/addons/hr_expense/models/hr_expense.py
+++ b/addons/hr_expense/models/hr_expense.py
@@ -651,6 +651,6 @@ def activity_update(self):
         for expense_report in self.filtered(lambda hol: hol.state == 'submit'):
             self.activity_schedule(
                 'hr_expense.mail_act_expense_approval', fields.Date.today(),
-                user_id=expense_report._get_responsible_for_approval().id)
+                user_id=expense_report.sudo()._get_responsible_for_approval().id)
         self.filtered(lambda hol: hol.state == 'approve').activity_feedback(['hr_expense.mail_act_expense_approval'])
         self.filtered(lambda hol: hol.state == 'cancel').activity_unlink(['hr_expense.mail_act_expense_approval'])
diff --git a/addons/hr_holidays/models/hr_leave_allocation.py b/addons/hr_holidays/models/hr_leave_allocation.py
index 82d1544acb5b..17cfddd53a98 100644
--- a/addons/hr_holidays/models/hr_leave_allocation.py
+++ b/addons/hr_holidays/models/hr_leave_allocation.py
@@ -340,12 +340,12 @@ def activity_update(self):
             elif allocation.state == 'confirm':
                 allocation.activity_schedule(
                     'hr_holidays.mail_act_leave_allocation_approval', fields.Date.today(),
-                    user_id=allocation._get_responsible_for_approval().id)
+                    user_id=allocation.sudo()._get_responsible_for_approval().id)
             elif allocation.state == 'validate1':
                 allocation.activity_feedback(['hr_holidays.mail_act_leave_allocation_approval'])
                 allocation.activity_schedule(
                     'hr_holidays.mail_act_leave_allocation_second_approval', fields.Date.today(),
-                    user_id=allocation._get_responsible_for_approval().id)
+                    user_id=allocation.sudo()._get_responsible_for_approval().id)
             elif allocation.state == 'validate':
                 to_do |= allocation
             elif allocation.state == 'refuse':