Use blocklists to prevent fraud and criminal activity.

Blocklists are lists of customer attribute values that are blocked from buying from you. For example, if a customer attempts to make a purchase from you with a credit card that is in a blocklist, the transaction is blocked and is not processed.

Before a new transaction is processed in Rebilly, blocklists are examined to check for attributes related to the entity. If a match is detected, the operation is aborted. A blocklist that expires after a period of time is called a greylist.