You can fill it out and send it in but it will most likely (if not 100%) involve another credit pull. Also there is no guarantee you would get the bonus since it would be well after the initial visa approval. You will have to wait 18 months +/- to apply for the AA cards again so you cannot include it in an upcoming app spree. This same thing happened to me, I just let it go and focused on getting the biz card 65+ days later. Not worth the trouble IMO.