diff --git a/addons/l10n_co/models/res_partner.py b/addons/l10n_co/models/res_partner.py
index 986ecf2397e..0fb3bf9e149 100644
--- a/addons/l10n_co/models/res_partner.py
+++ b/addons/l10n_co/models/res_partner.py
@@ -24,26 +24,28 @@ class ResPartner(models.Model):
     def _compute_verification_code(self):
         multiplication_factors = [71, 67, 59, 53, 47, 43, 41, 37, 29, 23, 19, 17, 13, 7, 3]
 
-        for partner in self.filtered(lambda partner: partner.vat and partner.country_id == self.env.ref('base.co') and
-                                     len(partner.vat) <= len(multiplication_factors)):
-            number = 0
-            padded_vat = partner.vat
+        for partner in self:
+            if partner.vat and partner.country_id == self.env.ref('base.co') and len(partner.vat) <= len(multiplication_factors):
+                number = 0
+                padded_vat = partner.vat
 
-            while len(padded_vat) < len(multiplication_factors):
-                padded_vat = '0' + padded_vat
+                while len(padded_vat) < len(multiplication_factors):
+                    padded_vat = '0' + padded_vat
 
-            # if there is a single non-integer in vat the verification code should be False
-            try:
-                for index, vat_number in enumerate(padded_vat):
-                    number += int(vat_number) * multiplication_factors[index]
+                # if there is a single non-integer in vat the verification code should be False
+                try:
+                    for index, vat_number in enumerate(padded_vat):
+                        number += int(vat_number) * multiplication_factors[index]
 
-                number %= 11
+                    number %= 11
 
-                if number < 2:
-                    partner.l10n_co_verification_code = number
-                else:
-                    partner.l10n_co_verification_code = 11 - number
-            except ValueError:
+                    if number < 2:
+                        partner.l10n_co_verification_code = number
+                    else:
+                        partner.l10n_co_verification_code = 11 - number
+                except ValueError:
+                    partner.l10n_co_verification_code = False
+            else:
                 partner.l10n_co_verification_code = False
 
     @api.constrains('vat', 'country_id', 'l10n_co_document_type')