diff --git a/addons/account/i18n/account.pot b/addons/account/i18n/account.pot
index 7e9db1039a8..dfd2f1bff9a 100644
--- a/addons/account/i18n/account.pot
+++ b/addons/account/i18n/account.pot
@@ -6841,6 +6841,12 @@ msgid ""
 " entry. You should create the credit note manually instead."
 msgstr ""
 
+#. module: account
+#: code:addons/account/models/account_move.py:0
+#, python-format
+msgid "It was previously '%(previous)s' and it is now '%(now)s'."
+msgstr ""
+
 #. module: account
 #: model_terms:ir.ui.view,arch_db:account.view_move_form
 msgid "JRNL/2016/00001"
@@ -12840,6 +12846,12 @@ msgid ""
 "applied."
 msgstr ""
 
+#. module: account
+#: code:addons/account/models/account_move.py:0
+#, python-format
+msgid "The sequence format has changed."
+msgstr ""
+
 #. module: account
 #: code:addons/account/models/sequence_mixin.py:0
 #, python-format
@@ -12848,6 +12860,32 @@ msgid ""
 "^(?P<prefix1>.*?)(?P<seq>\\d*)(?P<suffix>\\D*?)$"
 msgstr ""
 
+#. module: account
+#: code:addons/account/models/account_move.py:0
+#, python-format
+msgid ""
+"The sequence will never restart.\n"
+"The incrementing number in this case is '%(formatted_seq)s'."
+msgstr ""
+
+#. module: account
+#: code:addons/account/models/account_move.py:0
+#, python-format
+msgid ""
+"The sequence will restart at 1 at the start of every month.\n"
+"The year detected here is '%(year)s' and the month is '%(month)s'.\n"
+"The incrementing number in this case is '%(formatted_seq)s'."
+msgstr ""
+
+#. module: account
+#: code:addons/account/models/account_move.py:0
+#, python-format
+msgid ""
+"The sequence will restart at 1 at the start of every year.\n"
+"The year detected here is '%(year)s'.\n"
+"The incrementing number in this case is '%(formatted_seq)s'."
+msgstr ""
+
 #. module: account
 #: code:addons/account/wizard/account_resequence.py:0
 #, python-format
diff --git a/addons/account/models/account_move.py b/addons/account/models/account_move.py
index 614690d172f..f702ad67fe4 100644
--- a/addons/account/models/account_move.py
+++ b/addons/account/models/account_move.py
@@ -1190,6 +1190,47 @@ class AccountMove(models.Model):
         else:
             self.show_name_warning = False
 
+        origin_name = self._origin.name
+        if not origin_name or origin_name == '/':
+            origin_name = self.highest_name
+        if self.name and self.name != '/' and origin_name and origin_name != '/':
+            new_format, new_format_values = self._get_sequence_format_param(self.name)
+            origin_format, origin_format_values = self._get_sequence_format_param(origin_name)
+
+            if (
+                new_format != origin_format
+                or dict(new_format_values, seq=0) != dict(origin_format_values, seq=0)
+            ):
+                changed = _(
+                    "It was previously '%(previous)s' and it is now '%(current)s'.",
+                    previous=origin_name,
+                    current=self.name,
+                )
+                reset = self._deduce_sequence_number_reset(self.name)
+                if reset == 'month':
+                    detected = _(
+                        "The sequence will restart at 1 at the start of every month.\n"
+                        "The year detected here is '%(year)s' and the month is '%(month)s'.\n"
+                        "The incrementing number in this case is '%(formatted_seq)s'."
+                    )
+                elif reset == 'year':
+                    detected = _(
+                        "The sequence will restart at 1 at the start of every year.\n"
+                        "The year detected here is '%(year)s'.\n"
+                        "The incrementing number in this case is '%(formatted_seq)s'."
+                    )
+                else:
+                    detected = _(
+                        "The sequence will never restart.\n"
+                        "The incrementing number in this case is '%(formatted_seq)s'."
+                    )
+                new_format_values['formatted_seq'] = "{seq:0{seq_length}d}".format(**new_format_values)
+                detected = detected % new_format_values
+                return {'warning': {
+                    'title': _("The sequence format has changed."),
+                    'message': "%s\n\n%s" % (changed, detected)
+                }}
+
     def _get_last_sequence_domain(self, relaxed=False):
         self.ensure_one()
         if not self.date or not self.journal_id:
diff --git a/addons/account/tests/test_sequence_mixin.py b/addons/account/tests/test_sequence_mixin.py
index 63705950ec2..bd0566f252b 100644
--- a/addons/account/tests/test_sequence_mixin.py
+++ b/addons/account/tests/test_sequence_mixin.py
@@ -79,12 +79,22 @@ class TestSequenceMixin(AccountTestInvoicingCommon):
         copy2.journal_id = new_journal
         self.assertEqual(copy2.name, 'MISC2/2016/01/0001')
         with Form(copy2) as move_form:  # It is editable in the form
-            move_form.name = 'MyMISC/2016/0001'
+            with mute_logger('odoo.tests.common.onchange'):
+                move_form.name = 'MyMISC/2016/0001'
+                self.assertIn(
+                    'The sequence will restart at 1 at the start of every year',
+                    move_form._perform_onchange(['name'])['warning']['message'],
+                )
             move_form.journal_id = self.test_move.journal_id
             self.assertEqual(move_form.name, '/')
             move_form.journal_id = new_journal
             self.assertEqual(move_form.name, 'MISC2/2016/01/0001')
-            move_form.name = 'MyMISC/2016/0001'
+            with mute_logger('odoo.tests.common.onchange'):
+                move_form.name = 'MyMISC/2016/0001'
+                self.assertIn(
+                    'The sequence will restart at 1 at the start of every year',
+                    move_form._perform_onchange(['name'])['warning']['message'],
+                )
         copy2.action_post()
         self.assertEqual(copy2.name, 'MyMISC/2016/0001')
 
diff --git a/odoo/tests/common.py b/odoo/tests/common.py
index 1877324f63c..3f47ed82e7a 100644
--- a/odoo/tests/common.py
+++ b/odoo/tests/common.py
@@ -2135,6 +2135,7 @@ class Form(object):
             for k, v in values.items()
             if k in self._view['fields']
         )
+        return result
 
     def _onchange_values(self):
         return self._onchange_values_(self._view['fields'], self._values)