diff --git a/src/store/index.js b/src/store/index.js
index 373a38b7..406cdba9 100644
--- a/src/store/index.js
+++ b/src/store/index.js
@@ -1463,7 +1463,7 @@ export const useMainStore = defineStore({
                     claimNumber: insuranceCoverage.claimNumber
                 },
                 payment: {
-                    parentAccountNumber: this.order.parentAccountNumber,
+                    parentAccountNumber: this.order.parentAccountNumber ?? this.issConfig.parentAccountNumber,
                     billToAccountNumber: this.billToAccountNumber,
                     paypalToken: payment.paypalToken,
                     paymentMethod: payment.paymentMethod === paymentMethods.PayNow ? null : payment.paymentMethod,