Card testing Definition.
Fraud that tests stolen or generated card numbers in bulk on poorly protected sites, using micro-transactions or zero-amount authorizations. It shows up as sudden spikes in declined attempts and damages the MID’s reputation with issuers. Countermeasures: CAPTCHA, velocity checks, mandatory CVV, and blocking BINs that see abnormal traffic.
See also
Where this term appears
GuideTransaction data and approval ratesGuideRunning payments by the numbers: the KPIs that drive decisionsGuideDisputes from the merchant sideGuideFraud prevention and toolingGuideCyber threats to paymentsCourseMastering disputes and chargebacksCourseFraud prevention: detecting, scoring, and fighting backCourseManaging a fraud crisisCourseScheme rules and complianceCourseAI and fraud prevention