diff --git a/addons/account/tests/test_account_move_send.py b/addons/account/tests/test_account_move_send.py
index ef5057bcc51..5021a10665e 100644
--- a/addons/account/tests/test_account_move_send.py
+++ b/addons/account/tests/test_account_move_send.py
@@ -888,8 +888,8 @@ class TestAccountMoveSend(TestAccountMoveSendCommon):
         self.assertFalse(invoice.invoice_pdf_report_id)
         self.assertTrue(invoice.message_main_attachment_id)
 
-    def test_with_empty_mail_template(self):
-        """ Test you can use the send & print wizard without any mail template. """
+    def test_with_empty_mail_template_single(self):
+        """ Test you can use the send & print wizard without any mail template if and only if you are in single mode. """
         self.partner_a.email = "turlututu@tsointsoin"
         invoice = self.init_invoice("out_invoice", amounts=[1000], post=True)
 
@@ -900,6 +900,18 @@ class TestAccountMoveSend(TestAccountMoveSendCommon):
         message = self.env['mail.message'].search([('model', '=', invoice._name), ('res_id', '=', invoice.id)], limit=1)
         self.assertRecordValues(message, [{'subject': custom_subject}])
 
+    def test_with_empty_mail_template_multi(self):
+        """ Test shouldn't be able to send email without mail template in multi mode. """
+        self.partner_a.email = "turlututu@tsointsoin"
+        invoice_1 = self.init_invoice("out_invoice", amounts=[1000], post=True)
+        invoice_2 = self.init_invoice("out_invoice", amounts=[1000], post=True)
+
+        custom_subject = "turlututu"
+        wizard = self.create_send_and_print((invoice_1 + invoice_2), mail_template_id=None, mail_subject=custom_subject)
+
+        with self.assertRaises(UserError):
+            wizard.action_send_and_print(allow_fallback_pdf=True)
+
     def test_with_draft_invoices(self):
         """ Use Send & Print wizard on draft invoice(s) should raise an error. """
         invoice_posted = self.init_invoice("out_invoice", amounts=[1000], post=True)
diff --git a/addons/account/wizard/account_move_send.py b/addons/account/wizard/account_move_send.py
index 9789afe98da..e4df2e30978 100644
--- a/addons/account/wizard/account_move_send.py
+++ b/addons/account/wizard/account_move_send.py
@@ -653,6 +653,10 @@ class AccountMoveSend(models.TransientModel):
                                     proforma PDF report instead.
         """
         self.ensure_one()
+
+        if self.mode == 'invoice_multi' and self.checkbox_send_mail and not self.mail_template_id:
+            raise UserError(_('Please select a mail template to send multiple invoices.'))
+
         force_synchronous = force_synchronous or self.checkbox_download
         process_later = self.mode == 'invoice_multi' and not force_synchronous
         if process_later:
diff --git a/addons/account/wizard/account_move_send_views.xml b/addons/account/wizard/account_move_send_views.xml
index 74f18544498..14d9f2ce07d 100644
--- a/addons/account/wizard/account_move_send_views.xml
+++ b/addons/account/wizard/account_move_send_views.xml
@@ -80,6 +80,7 @@
                         </group>
                         <group>
                             <field name="mail_template_id"
+                                   required="mode == 'invoice_multi'"
                                    options="{'no_create': True, 'no_edit': True}"
                                    context="{'default_model': 'account.move'}"/>
                         </group>