Bots
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
Valid carding data
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