diff --git a/addons/hr_expense/models/hr_expense.py b/addons/hr_expense/models/hr_expense.py
index 956224ef800..0f40421bd0b 100644
--- a/addons/hr_expense/models/hr_expense.py
+++ b/addons/hr_expense/models/hr_expense.py
@@ -500,41 +500,29 @@ class HrExpenseSheet(models.Model):
         self.department_id = self.employee_id.department_id
 
     @api.multi
-    def check_consistency(self):
-        for rec in self:
-            expense_lines = rec.expense_line_ids
-            if not expense_lines:
-                continue
-            if any(expense.employee_id != rec.employee_id for expense in expense_lines):
-                raise UserError(_("Expenses must belong to the same Employee."))
-            if any(expense.payment_mode != expense_lines[0].payment_mode for expense in expense_lines):
-                raise UserError(_("Expenses must have been paid by the same entity (Company or employee)"))
-
-    @api.one
-    @api.constrains('expense_line_ids')
-    def _check_employee(self):
-        employee_ids = self.expense_line_ids.mapped('employee_id')
-        if len(employee_ids) > 1 or (len(employee_ids) == 1 and employee_ids != self.employee_id):
-            raise ValidationError(_('You cannot add expense lines of another employee.'))
-
-    @api.one
     @api.constrains('expense_line_ids')
     def _check_payment_mode(self):
-        payment_mode = set(self.expense_line_ids.mapped('payment_mode'))
-        if len(payment_mode) > 1:
-            raise ValidationError(_('You cannot report expenses with different payment modes.'))
+        for sheet in self:
+            expense_lines = sheet.mapped('expense_line_ids')
+            if expense_lines and any(expense.payment_mode != expense_lines[0].payment_mode for expense in expense_lines):
+                raise ValidationError(_("Expenses must have been paid by the same entity (Company or employee)"))
+
+    @api.constrains('expense_line_ids', 'employee_id')
+    def _check_employee(self):
+        for sheet in self:
+            employee_ids = sheet.expense_line_ids.mapped('employee_id')
+            if len(employee_ids) > 1 or (len(employee_ids) == 1 and employee_ids != sheet.employee_id):
+                raise ValidationError(_('You cannot add expense lines of another employee.'))
 
     @api.model
     def create(self, vals):
         self._create_set_followers(vals)
         sheet = super(HrExpenseSheet, self).create(vals)
-        sheet.check_consistency()
         return sheet
 
     @api.multi
     def write(self, vals):
         res = super(HrExpenseSheet, self).write(vals)
-        self.check_consistency()
         if vals.get('employee_id'):
             self._add_followers()
         return res