diff --git a/account_move_protect_deleting/models/account_move.py b/account_move_protect_deleting/models/account_move.py
index e2e4545..33019a0 100644
--- a/account_move_protect_deleting/models/account_move.py
+++ b/account_move_protect_deleting/models/account_move.py
@@ -1,6 +1,5 @@
 from odoo import models, api, _
 from odoo.exceptions import UserError
-import re
 
 class AccountMove(models.Model):
     _inherit = 'account.move'
@@ -9,18 +8,26 @@ class AccountMove(models.Model):
     def _check_posted(self):
         """ Prevent deletion of a account move if it has been posted
             exeptions : Check deposit or Cash deposit. In V16 in odoo the account move is deleted
-                        when the check deposit is reset to draft. 
+                        when the check deposit is reset to draft.
                         This work the same with Cash deposit
         """
 
-        pattern_CHQ_DEPOSIT = r"DEP\d{3}"
-        pattern_CASH_DEPOSIT = r"CASH-DEP-\d{3}"
+        # search in account.cash.deposit if account move is this one
+        for cash_deposit in self.env['account.cash.deposit'].search([]):
+            if cash_deposit.move_id == self:
+                print (cash_deposit.move_id, self)
+                is_cash_deposit = True
+
+        # search in account.check.deposit if account move is this one
+        for check_deposit in self.env['account.check.deposit'].search([]):
+            if check_deposit.move_id == self:
+                is_check_deposit = True
 
         if (
-            self.posted_before and 
-                ( 
-                not re.search(pattern_CHQ_DEPOSIT, self.ref) 
-                and not re.search(pattern_CASH_DEPOSIT, self.ref) 
+            self.posted_before and
+                (
+                not is_cash_deposit
+                and not is_check_deposit
                 )
             ):
             raise UserError(_(""