Found some info, hope it helps
:
One of Visa's several compliance programs for merchants;
Highly Suspect Potential Fraud
The Risk Identification Service (RIS) is a service provided by Visa U.S.A, to identify merchants generating a disproportionately high percentage of suspect transactions. Suspect transactions are defined as transactions which took place on the day a credit card was reported lost or stolen and may be potential fraud activity. Visa distributes information pertaining to abnormal levels of suspect transactions to Paymentech Payment Services on a daily, weekly, and monthly basis. Upon identification of a merchant as highly suspect, the merchant may be required to adhere to special procedures, install fraud-reducing equipment, and may suffer fines.