How do I know I can trust these reviews about American Express Gift Cards? How do I know I can trust ... December 6, 2024 call. They sent check and returned - allegedly because of wrong address.

Fun fact: American Express could print as many as 10^15 = 1,000,000,000,000,000 unique cards! (That’s, um, a quadrillion...) For project, I programmed a credit card checker in C using Luhn's Algorithm ...