Can I use an American Express card if it has 15 digits instead of 16?

American Express cards use a 15-digit number instead of the 16 digits on Visa and Mastercard, which can trip up a checkout form built for 16.

• If your AMEX is not accepted in the standard checkout form, it is usually the digit count, not the card itself.
• Contact 4OVER4 support by phone to complete the payment.
• The team can manually add your American Express card to your account.
• Once the card is on file, you can proceed with your order and payment.
• Having your card details ready when you call keeps the process quick.