diff --git a/src/services/flowaccount.ts b/src/services/flowaccount.ts
index c7d0f4c..9450b02 100644
--- a/src/services/flowaccount.ts
+++ b/src/services/flowaccount.ts
@@ -312,7 +312,7 @@ const flowAccount = {
       ]
         .filter(Boolean)
         .join(" "),
-      contactTaxId: customer.citizenId || customer.legalPersonNo,
+      contactTaxId: customer.citizenId || customer.legalPersonNo || "-",
       contactBranch:
         (customer.customer.customerType === CustomerType.PERS
           ? [customer.firstName, customer.lastName].join(" ").trim()