In the 1990s and early 2000s, some outdated payment systems only checked if the credit card number had the correct number of digits. Today, that is not the case.

While the generators themselves aren't illegal, matters immensely.

At its core, a refers to a software tool or algorithm that creates a seemingly valid credit card number that passes basic validation checks (like the Luhn algorithm) but is not linked to an active bank account or line of credit.