Hi, Looking to grab a Reward flight for next July for wife and myself. As I've already hit my spend threshold I intended to use my sons BA AMEX to pay so he can get the points. On booking it won't let me click the box for someone else paying even though he is in my friends and family list.

So question is, can someone who will not be travelling on the reward flight pay for it?

Thanks

(Sorry if this is answered elsewhere I did search but had no luck)