diff --git a/src/app/shared/components/invoices/sale-invoice-single-view.component.ts b/src/app/shared/components/invoices/sale-invoice-single-view.component.ts
index 558fe73..7dfe118 100644
--- a/src/app/shared/components/invoices/sale-invoice-single-view.component.ts
+++ b/src/app/shared/components/invoices/sale-invoice-single-view.component.ts
@@ -132,11 +132,12 @@ export class SharedSaleInvoiceSingleViewComponent {
             },
             {
               label: 'شماره اقتصادی',
-              value: this.invoice.customer
-                ? this.invoice.customer.type === 'LEGAL'
-                  ? this.invoice.customer.legal?.economic_code
-                  : this.invoice.customer.individual?.economic_code || '-'
-                : '-',
+              value:
+                (this.invoice.customer
+                  ? this.invoice.customer.type === 'LEGAL'
+                    ? this.invoice.customer.legal?.economic_code
+                    : this.invoice.customer.individual?.economic_code || '-'
+                  : '-') || '-',
             },
           ],
         },