A chargeback is a credit card payment transaction that has later been
rejected. The transaction is being "charged back" to you after the
original credit card payment transaction was authorized by the merchant account
processor and deposited into your bank account.
This type of transaction can occur for a variety of reasons. For example,
this might happen if a customer denies having made a particular credit card
transaction and refuses to pay the credit card company. You must research the
individual transaction to determine whether or not the chargeback is