The CancelDelivery() method is a way to cancel fulfillment of a letter still not delivered to the postal service. Cancellation may take up to a few minutes to succeed. If funds were deducted from the account, they will be refunded immediately.
|Username||String||As provided during registration|
|Password||String||As provided during registration|
|ID||int||Matches the ID provided as the response to the original Web Service request.|
|CancelDeliveryResult||int||Result code for this Web Service request. Possible result codes appear in the Web Service Result Codes list|