Carding is a process where carders, such as Trustedcvvshop and Cvvforsale, use credit and debit cards to obtain goods, services or sell card numbers to other people. These services can prepare a complete data set of someone else's card.
Because credit cards are often canceled quickly, a major part of carding involves testing the card to see if it's active.
Cvvdumpsshop, Cvv2shop and Shopcvv2 get sets of card numbers from their own payment channels. These sets are tested against ecommerce stores to validate the numbers. Carders make small purchases to determine the available balance and value of the card.