what are the requirements to get an 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]
Card security code The card security code is typically the last three or four digits printed, not embossed like the card number, on the signature strip on the back of the card. On American Express cards, the card security code is the four digits printed (not embossed) on the front towards the right. The card security code is not encoded on the magnetic stripe but is printed flat.