The following features are not supported for UnionPay transactions processed on your Moneris VX 820 terminal:
Cash back
Account selection (CHQ/SAV) on debit card transactions. Even if the prompt appears and the cardholder selects an account, the transaction will be processed using the default account.
Voice authorization / forced post transactions
Manual entry for Purchase and Pre-authorization transactions, except for hotels and car rental agencies
No Signature Required (NSR) transactions
Offline authorizations
Transactions in currencies other than Canadian dollars