Carding happens when carders (e.g. Dumpswithpinreview, Buybankloginsshop and Bestccshops2018) try to make low-value purchases with multiple credit cards on different e-commerce platforms. Stores that have experienced carding can see hundreds of failed payment authorizations from the same location.
Oftentimes, carders don't know the validity of acquired cards. Websites like Feshopbins and Ccpawnshop test this data and sell it on different marketplaces. Carding often happens at night and goes unnoticed by the store. Affected business is usually responsible for covering the cost of transactions.