A USDT payment integration is ready for production only when the complete order lifecycle works under normal and abnormal conditions. This checklist helps merchant and engineering teams verify wallet setup, checkout clarity, transfer matching, webhook processing and operational recovery before customers depend on the flow.
Confirm wallet and network configuration
Start by reviewing every receiving wallet configured for the merchant site. Confirm that each address belongs to the intended network and that the operations team can access the wallet without exposing private keys to the payment application. Test addresses should be replaced or clearly separated before production traffic begins.
At checkout, show the asset and network together instead of displaying USDT alone. TRC20, BEP20 and ERC20 transfers follow different networks, while Binance wallet payments use a separate flow. Clear labels help customers choose a supported method and reduce transfers sent through the wrong route.
- Verify every production receiving address
- Keep wallet private keys outside the integration
- Display the selected network beside the amount and address
Test order creation and exact amounts
Create payment orders from the server rather than from browser code. Store the returned payment ID with the merchant order number, and confirm that the checkout URL opens the expected site, title, currency and available payment methods. Secrets used to sign API requests must remain on the server.
For blockchain payments, the exact generated amount may include a decimal suffix used to match an incoming transfer to its order. Test that the amount shown on checkout, copied by the customer and recorded by the merchant system remains unchanged throughout the flow.
- Create orders only from trusted backend code
- Store both local and payment order identifiers
- Preserve the complete generated amount without rounding
Exercise every important payment state
A successful transfer is only one path through the system. Test pending and confirming states, then verify the final paid state after the required network observations. The customer page and merchant dashboard should describe the same status without implying that submission alone completes the order.
Also test expiration, delayed transfers, underpayment, overpayment and payments received after the expected window. Decide which states can resolve automatically and which require review. Document the response so support staff do not improvise fulfillment decisions during an incident.
- Test pending, confirming and paid transitions
- Create controlled underpaid and overpaid cases
- Define an operator response for every exception state
Verify webhooks before fulfillment
Treat the browser redirect as navigation, not proof of payment. Fulfillment should begin only after the server verifies a signed webhook or confirms the payment through an authenticated server-side query. For bestuPay, calculate HMAC-SHA256 over the raw request body with the site's Webhook Secret.
Webhook delivery can be repeated when a receiver times out or returns an error. Store event identifiers and make order updates idempotent so a retry cannot activate a subscription, release a download or ship an order twice. Return a successful HTTP response only after the event is safely accepted.
- Verify signatures against the unmodified request body
- Deduplicate events before running fulfillment
- Keep browser redirects outside the payment decision
Prepare monitoring and recovery
Before launch, confirm that operators can search by payment ID and merchant order number, inspect transaction hashes and review webhook delivery history. Logs should preserve enough context for reconciliation while excluding API secrets, webhook secrets and wallet credentials.
Run one final test with the merchant application temporarily unavailable. Verify that failed webhook delivery is visible, that retry or status reconciliation is possible and that the same payment cannot be fulfilled twice after recovery. Assign ownership for payment exceptions and review the process after launch.
- Monitor failed callbacks and unresolved payment states
- Keep transaction references for reconciliation
- Document recovery steps and operational ownership