I need to get a 2 day rental this weekend.. I've got 2 UA certs, getting me a free day. However, I'd like to use AWD A108300 for the cheaper rates (for the 2nd day which i'm paying for).

Is this possible? Do I just go ahead and book the rental with the AWD code above? Do I have to inform the agents ahead of time on the phone that i'll be using UA certs, and is there a "required" AWD code that I have to use with the certs?

Thanks in advance,
Darq