I've used it twice before quite awhile ago. 1st time no problem. 2nd time they wanted my company I.D. Counter person showed me her screen that showed "Verify company I.D." in the comments section. A business card is not good enough. It's a great rate, but only minimally better than the other "best" codes on here. Why take the risk for a few bucks?
Try L093590 or A108300, I bet the difference is not a lot, and there is no stress.