The Void message (cmpi_void) is responsible for cancelling an order or authorization transaction. Any hold of funds within the Consumer’s PayPal account will be removed. Only those transactions identified with a TransactionAction value of 'Authorization' or 'Order' on the Lookup message are eligible to be voided. If the TransactionAction is 'Order' and the AuthorizationCode is passed, the void will be processed against the specific Authorization that corresponds to the AuthorizationCode. If the TransactionAction is 'Order' and no AuthorizationCode is passed, the void will be processed against the Order and no further Authorizations or Captures can be performed against the Order.