What do you mean with "card rejected" ?
The Amex card is not so widely accepted in France like in the US/UK, because of the monopolistic position of the GIE.CB issuing both Visa and Eurocards for the french banks.
----
If the retailer has an agreement with Amex, and your payment is authorized by Amex, your card should not be rejected. This is true in all countries....
[This message has been edited by ahrz (edited 02-05-2001).]