diff --git a/Back/Controllers/TaxPayerController.cs b/Back/Controllers/TaxPayerController.cs
index 74e684b..a3c07d9 100644
--- a/Back/Controllers/TaxPayerController.cs
+++ b/Back/Controllers/TaxPayerController.cs
@@ -223,7 +223,8 @@ namespace Back.Controllers
                     //کد شعبه فروشنده
                     Sbc = string.IsNullOrEmpty(result.sbc) ? null : result.sbc,
                     //کد پستی خریدار
-                    Bpc = level == 10 || string.IsNullOrEmpty(result.bpc) ? null : result.bpc,
+                    Bpc = level == 10 || string.IsNullOrEmpty(result.bpc) || !string.IsNullOrEmpty(result.tinb)
+                    || result.tob == 1 || result.tob == 2 || result.tob == 3 || result.tob == 4 ? null : result.bpc,
                     //کد شعبه خریدار
                     Bbc = level == 10 || string.IsNullOrEmpty(result.bbc) ? null : result.bbc,
                     //نوع پرواز