diff --git a/addons/l10n_latam_invoice_document/models/account_move.py b/addons/l10n_latam_invoice_document/models/account_move.py
index c68c2d01ba2..78612a090fe 100644
--- a/addons/l10n_latam_invoice_document/models/account_move.py
+++ b/addons/l10n_latam_invoice_document/models/account_move.py
@@ -272,7 +272,8 @@ class AccountMove(models.Model):
         """ The constraint _check_unique_sequence_number is valid for customer bills but not valid for us on vendor
         bills because the uniqueness must be per partner """
         for rec in self.filtered(
-                lambda x: x.name and x.name != '/' and x.is_purchase_document() and x.l10n_latam_use_documents):
+                lambda x: x.name and x.name != '/' and x.is_purchase_document() and x.l10n_latam_use_documents
+                            and x.commercial_partner_id):
             domain = [
                 ('move_type', '=', rec.move_type),
                 # by validating name we validate l10n_latam_document_type_id