Originally Posted by palmanfr

The problem I see here is that amex or AXA will have no way to see that this ticket was purchased using the Amex as the ticket numbers will be different and the voucher numbers do not match any of the ticket numbers...
I only made an insurance claim once and one of the documents AXA was requesting was a proof that the flight was paid FULLY with the Amex, so they wanted the Amex statement, where the itinerary is usually displayed, together with the passenger name, booking class and ticket number, and also the eticket receipt from the airline highlighting that the entire ticket was paid by CCAX.
So if I had booked a ticket last year with my amex between CDG and JFK for a trip in April 2020 and the airline cancells the ticket, gives a voucher and I use it to rebook a flight CDG-DXB for Dec 2020 and break a leg in Dubai during this stay and need to go to the hospital, AXA could say that they have no records of me booking a flight to Dubai in Dec 2020. And the AF eticket you will send them as a claim will show "Exchange" or "Voucher" or "Avoir" depending on your ticket receipt (I have all 3 versions on the new tickets I have) but not Amex...
That's a catch 22 really

For the Flying blue reward tickets, this applies for the AF/KLM cobranded Amex cards only. For the regular Amex cards; Tickets paid with Membership rewards points are eligible for insurance coverage, but not FB award tickets.