diff --git a/CompanyManagment.EFCore/Repository/InstitutionContractRepository.cs b/CompanyManagment.EFCore/Repository/InstitutionContractRepository.cs
index ffaa4102..61a43882 100644
--- a/CompanyManagment.EFCore/Repository/InstitutionContractRepository.cs
+++ b/CompanyManagment.EFCore/Repository/InstitutionContractRepository.cs
@@ -1999,7 +1999,7 @@ public class InstitutionContractRepository : RepositoryBase<long, InstitutionCon
         {
             legalPartyRequest = new CreateInstitutionContractLegalPartyRequest()
             {
-                NationalCode = contractingParty.Nationalcode,
+                NationalCode = contractingParty.Nationalcode=="*"?string.Empty:contractingParty.Nationalcode,
                 BirthDateFa = contractingParty.DateOfBirth.ToFarsi(),
                 PhoneNumber = contractingParty.Phone,
                 FatherName = contractingParty.FatherName,