PayPal Express Checkout - 2012 Guia do Utilizador descarregar pdf (Página 42)

Related API Operations

Tracking Failed or Pending Requests

42 August 7, 2012 Express Checkout Integration Guide

1. In the RefundTransaction request, specify the transaction ID of the transaction whose

payment you want to refund.

TRANSACTIONID=transaction_id

2. Specify the kind of refund, which is either Full or Partial.

REFUNDTYPE=Full

REFUNDTYPE=Partial

3. For a partial refund, specify the refund amount, including the currency.

AMT=amount

CURRENCYCODE=currencyID

4. For a partial refund, specify the memo description.

NOTE=description

5. Execute the RefundTransaction operation.

6. Check the acknowledgement status in the RefundTransaction response to ensure that

the operation was successful.

Related information:

"Refunds" on page 28

Tracking Failed or Pending Requests

You can use the MsgSubID (Message Submission ID) to help track pending or failed requests.

MsgSubID has been added to the request and response for following API calls:

 DoAuthorization

 DoReferenceTransaction

 RefundTransaction

 DoCapture

Idempotency is useful in cases where a request has failed or if you are unsure about the results

of an original request. It also helps to correlate request payloads with response payloads.

Idempotency helps to eliminate duplicate requests, since a request sent with a previously

accompanying MsgSubID will return with latest status of of the previous request that used the

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PayPal Express Checkout - 2012 Guia do Utilizador Página 42