Originally Posted by
VegasGambler
I think the agent can do it when you check in. Or call EY.
When you book awards and want a different FF number; it's better to book them for "someone else" and enter your info manually, so it does not autofill the FF.
I just did an online chat with etihad and they were able to change it. Next time I'll add it at booking. You're advice is right about booking and leaving it blank. I'm so used to doing it with skyteam and delta lets you easily change it.