Page History
...
Type of transaction (on-line cancellation, refund, financial transaction cancellation, partial cancellation) will be determined by IPS Assist automatically depending on the amount (full or partial cancellation), processing, type of card, availability of a financial transaction for parental authorization, and refund reason.
If enterprise uses cheque in the order payment then only cheque items cancellation is possible. The canceled cheque items should be passed in ChequeItem property. The cheque usage in the orders is described in details in the section Payment With Cheque.