So here is my (purely hypothetical) question: Using a U.S. Chase/BA Companion Voucher (offically known as a "Travel Together Ticket"), my companion and I fly together to Europe from the U.S. (say, for example, to CDG). If my companion does not make the return flight with me, or perhaps stays in London, on the return flight, what are the consequences?

I have carefully read the Terms & Conditions, but no answer is found.

Of course, I assume that there would be no refund on the ticket price (or the voucher), but are there any other consequences?

Thanks for any advice.......