diff --git a/models/res_partner_contract_annex.py b/models/res_partner_contract_annex.py
index 15f7dd0..07a5859 100755
--- a/models/res_partner_contract_annex.py
+++ b/models/res_partner_contract_annex.py
@@ -119,6 +119,7 @@ class ContractOrderAnnex(models.Model, IDocument, Extension):
     def get_name_by_document_template(self, document_template_id):
         return (
             {
+                "bill": "{name}";
                 "specification": "{counter} {name}",
                 "approval_list": "{counter}.1 {name}-1",
                 "act_at": "{counter}.2 {name}-2",