I booked AA with Avios. Can I just bring my marriage certificate to LGA to the AA check in desk and be okay?
1) Flying international makes it more of a problem.
2) If they do have an issue. AA will tell you go to BA. And BA will tell you its a points booking so they cant get you on another flight, you will have to rebook.
That said, im not trying to be negative. But my story is recent, from the same airport, same airline, & same thing as far as points. Just make sure you are prepared with other travel plans if these fall through. If you get through its a miracle. When my story happened everyone i spoke to (including highups) told me that there is nothing they can do. I wish you lots of luck! I pray it works out... Let us know...