Hi,
we're a digital marketing consultancy based in UK, & a US customer is trying to pay us using their AMEX card. The message they're getting when they do is "Your credit card has been declined. Please try another one".
Is this an AMEX issue? They've tried three different cards, I've edited the invoice to ensure the address matches the one to which the card is registered but no luck.
Any advice/answers gratefully received.
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