Chargebacks
What is a chargeback?
A chargeback is a debit to a merchant's account from a previous sales transaction. The reasons for chargebacks can be due to errors made by the merchant in the submission of their credit card transactions, non-authorized transactions and disputes from cardholders. When this occurs, Moneris will send the merchant a "Sales Draft Copy Request" which asks for a copy of the receipt as proof that the cardholder authorized the sale. When you receive these notices, please respond to them within the timeframe indicated on the notice.
For more information take a look at How To Reduce Chargebacks