Verify transaction status

If your ECR didn't get a response to a payment, the payment may still have been approved. Check its status before you try again, so the customer is never charged twice.

Requirements

Requirement	Description
Integration	Local integration or Cloud integration
Before you start	Your ECR is connected and logged in. See Connect your ECR
Message	TransactionStatus

How it works

If the connection breaks after you sent a request but before you got the response (ECR power failure, terminal power failure or a network problem), the result is unknown. It may have been approved.

Reconnect if needed.
Send TransactionStatus to get the result of the transaction.
Only if it didn't go through, try again.

TransactionStatus works only for payments (MessageCategory = Payment). Leave out ServiceID to get the latest payment. To check a payment sent by another ECR, add its SaleID.
If the response has no RepeatedMessageResponse, the payment isn't finished yet. Don't treat it as failed, and don't start a new payment. Send TransactionStatus again.
The cashier can also check on the terminal. See Check the last transaction.

See the example request on TransactionStatus.

Testing

Break the connection during a payment: pull the network cable, or switch off the ECR or the terminal. After reconnecting, the ECR finds the result with TransactionStatus before it tries again. See Test and get approved.