how do you qualify for american express black card
Centurion Card The Centurion Card is invitation-only after appropriate net worth With American Express, credit, and spending criteria are met.[3] American Express does not publicly disclose the requirements necessary for getting or keeping a card, except that the cardholder needs to have a substantial net worth, as well as having been a Platinum card holder.[3]
Payment card number While the vast majority of Visa's account ranges describe 16 digit card numbers there are still a few (40 as of 11 Dec. 2013) account ranges dedicated to 13 digit PANs and several (439 as of 11 Dec. 2013) account ranges where the issuer can mix 13 and 16 digit card numbers. Visa's VPay brand can specify PAN lengths from 13 to 19 digits and so card numbers of more than 16 digits are now being seen.