> For the complete documentation index, see [llms.txt](https://doc.vietqr.vn/doc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.vietqr.vn/doc/api-vietqr-callback/hoi-dap-ky-thuat.md).

# Hỏi đáp kỹ thuật

Câu trả lời được ghi tại :  ![](file:///C:/Users/TUAN_P~1/AppData/Local/Temp/SNAGHTML863f2c1.PNG)

> Câu hỏi : Sao giao dịch trả về lại không có orderId các bạn nhỉ : CreateOrderAsync {"amount":0.0,"content":"DU5gUz","bankAccount":"2625081990","bankCode":"MB","userBankName":"TRAN DUC THONG","transType":"c","orderId":"DU5gUz","qrType":"0","reconcliliation":false}
>
> 2026/01/08 10:56:09.447: PaymentApiController TransactionSync {"transactionid":"c0e43e2c-75b8-4c7f-8826-b72945d89a9f","transactiontime":1767844560000,"referencenumber":"FT26008507756020","amount":25000.0,"content":"QR VQR712a7d45ea DU5gUz Ma giao dich Trace756759 Trace 756759","bankaccount":"2625081990","orderId":"","sign":"","terminalCode":"","urlLink":"","serviceCode":"","subTerminalCode":""}