Originally Posted by
flyer7624
I transfered to Amex US 10+ years ago through the global transfer program.
Have you ever filed a US tax return? If so, then you'll have an ITIN in lieu of a SSN. It's the same format number from the same numberspace, so I'd use that. A quick check in Google says that Amex will accept it. Whether that will link to a credit report or not is another matter, and whether the results of that will affect a Centurion application is yet another matter. But completing the application with an ITIN may at least get you past the point of "the application can't be processed without this number."