The Unzer Direct Fraud Filter
Fraud Filter allows merchants to design their own fraud system.
Fore more information on how the Fraud Filter works, see Setting up the Fraud Filter.
A payment being flagged as Possible fraud does not necessarily mean that it is indeed fraud. In the same way, payments that are not flagged cannot be seen as necessarily safe. As a merchant, you should always assess and examine payments that seem suspicious on a one-by-one basis.