give me detail information of credit card testing?

Answer 1

There are several possibilities that you are talking about:

A. When you start with your new credit card equipment, you need to try it with a credit card number. That process is called credit card testing.

B. In the past, carders used to use computer programs called "generators" to produce a sequence of credit card numbers, and then test them to see which were valid accounts. Another variation would be to take false card numbers to a location that does not immediately process card numbers, such as a trade show or special event. This is also called credit card testing as well for some folks.
However, now some requires the security code. That make the fraud a bit difficult.