I'm flying to SJC next month with a coworker whose flight arrives one day later than me. Right now, I've got a rental car reserved with Alamo under my name. I'm wondering if it's possible for me to pick up the rental car when I arrive and then come back to the rental desk the next day to add my coworker as an additional driver. Will Alamo allow this? Or do they require that adding an additional driver must be done when I initially pick up the car? I've read that for some rental companies it's OK to do this, but I wasn't sure if it was OK for Alamo?

Thanks!