Carding refers to a situation where carders, e.g. Buyccforcarding and Cardingdump, test card details to determine whether they're still active, reported to be stolen or deactivated. These cards can be bought on the dark web. People can phish them from emails or use financial databases.
Idea of carding
The main idea of carding is to perform transactions on ecommerce websites. If a payment portal accepts a card, it's almost impossible for the cardholder to reclaim the funds. More often, the owner of the website is responsible for the loss while carders, such as Cvvshopsonline and Centralshopcc, remain anonymity.