Originally Posted by
pauleeepaul
Without exception this sets off the fraud warning bells at my credit card issuer (Citibank), resulting in the charge being denied and needing to call Citi and then rebook the award.

I never said it was easy

but it is doable. I have the same problems with Citibank but AmEx seems to work fine.
Citi explained to me that BA first verifies the card with a 1 USD authorization (which gets approved) and then the second charge which comes immediately after the first authorization gets declined.
But it is possible to book tickets with a card issued anywhere - just by changing the home page to that specific country...