diff --git a/addons/account/models/account_move.py b/addons/account/models/account_move.py
index c1d98380c35..082d5656edc 100644
--- a/addons/account/models/account_move.py
+++ b/addons/account/models/account_move.py
@@ -3830,6 +3830,25 @@ class AccountMove(models.Model):
             else 'account.email_template_edi_invoice'
         )
 
+    def _notify_get_recipients_groups(self, message, model_description, msg_vals=None):
+        groups = super()._notify_get_recipients_groups(
+            message, model_description, msg_vals=msg_vals)
+        local_msg_vals = dict(msg_vals or {})
+        if self.move_type != 'entry':
+            # This allows partners added to the email list in the sending wizard to access this document.
+            for group_name, _group_method, group_data in groups:
+                if group_name == 'customer' and self._portal_ensure_token():
+                    access_link = self._notify_get_action_link(
+                        'view', **local_msg_vals, access_token=self.access_token)
+                    group_data.update({
+                        'has_button_access': True,
+                        'button_access': {
+                            'url': access_link,
+                        },
+                    })
+
+        return groups
+
     def _get_report_base_filename(self):
         return self._get_move_display_name()
 
diff --git a/addons/account/tests/test_account_move_send.py b/addons/account/tests/test_account_move_send.py
index 459d582a8b7..c65c66566fd 100644
--- a/addons/account/tests/test_account_move_send.py
+++ b/addons/account/tests/test_account_move_send.py
@@ -413,3 +413,34 @@ class TestAccountComposerPerformance(AccountMoveSendBase):
 
         # invoice update
         self.assertTrue(test_move.is_move_sent)
+
+    def test_invoice_sent_to_additional_partner(self):
+        """
+        Make sure that when an invoice is sent to a partner who is not
+        the invoiced customer, they receive a link containing an access token,
+        allowing them to view the invoice without needing to log in.
+        """
+        test_move = self.test_account_moves[1].with_env(self.env)
+
+        additional_partner = self.env['res.partner'].create({
+            'name': "Additional Partner",
+            'email': "additional@example.com",
+        })
+
+        default_ctx = test_move.action_send_and_print()['context']
+        composer_form = Form(
+            self.env['account.move.send'].with_context(default_ctx)
+        )
+        composer_form.mail_partner_ids.add(additional_partner)
+        composer_form.checkbox_ubl_cii_xml = False
+        composer = composer_form.save()
+
+        with self.mock_mail_gateway(mail_unlink_sent=False):
+            composer.action_send_and_print()
+
+        self.assertMailMail(
+            additional_partner,
+            'sent',
+            author=self.user_account_other.partner_id,
+            content='access_token='
+        )