I use citi professional. I assume it's the case with other citi "business" or "business-type" cards as well... See http://www.flyertalk.com/forum/showthread.php?t=734996
post #7

I'm too lazy to search for other threads on citi professional. It's also talked about on fatwallet as well.

I haven't rented a car in a year or so though so you should double-check with citi.