You can anytime reach the customer call service of American Express to get any assistance concerning confirmation of your American Express Card and confirming your credit card or for other issues too.
Here are the customer care service toll-free numbers of AMEX to confirm your American Express Card or other issues :
- 1‑800‑954‑0559 (for the US).
- 1‑801-449-4019 (for outside the US).
You can also reach AMEX customer care with their live chat just by logging into your online banking account.