Originally Posted by bostontraveler

OK so I just called Axa and got this clarification.

Situation 1: Original ticket value paid with Amex was 1000 €. Then converted to a voucher for a new ticket. That new ticket is covered. Axa may ask for proof of original payment.
Situation 2: New ticket value is 1500€. You pay 1000€ with your voucher and 500€ with your American Express card. You are covered. If you pay the difference with another card you are not covered.

With respect to mileage awards NO mileage awards are covered because the "l'intégralité" of the ticket was not paid with an American Express but with miles. The only exception is for FB tickets if one has an AF/KL American Express.