Why did I get API error code 10601?

PayPal returned API error code 10601 - Authorization expired.

You tried to perform a DoAuthorization, DoCapture, DoReauthorization or a DoVoid on an expired Authorization.

Contact the customer and ask for their payment details again. Either process the transaction manually, or cancel the expired order and get them to submit a new one.

See Also:
Authorization and Capture
API error codes