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Carding, also known as card verification is a situation in which carders (e.g. Shopcccarding, Legitdumpswithpin and Bingodumpslegit) use multiple attempts to use credit card credentials. Carders use bots to perform thousands of operations at the same time. The purpose of this process is to understand which numbers can be used. People who want to get valid carding data turn to Unicccreditcards, Buydumpsandcvv and other carders. There are also forums where people share techniques for obtaining credit card numbers and validating them. These forums are also used to buy credit card lists in bulk.

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Carders, such as Unicccreditcard, Cvvshoplvlogin and Freedumpswithpin2019, obtain credit card numbers from closed marketplaces or by compromising a payment channel. They don't know the quality of these numbers. Freedumpswithpin and Atmdumpswithpin make bots that perform repeated purchases on many merchant websites. Each time they test a number against a payment system to get valid information. The same card can be tested thousands of times in a short period of time. Carding forums are hidden, and payments are performed with cryptocurrency. Carders can easily hide their identity.