Keep in mind that using any corporate discount code you are not entitled for always carries a risk. One is not "safer" than another. All is takes is for a counter agent to ask for proof that you work for the firm in question. Lots of people here will say they have never been asked for proof, and I don't doubt their veracity, but there are plenty of people I know who have been asked for proof and when they couldn't provide it, they were charged the walk-up rate instead which for someone like Hertz or Avis can be an eye-popping number.

Additionally, many of these corporate accounts include CDW/LDW and even if if they don't a report goes back to the company anytime there is an accident claim since it can impact their negotiated rates. There are a number of horror stories on FT where someone booked on a corp code got into an accident and they were in a bad spot due to the damage claim.

I'm just saying be aware of the risks before you try to use one.

PS--The code above (A074800) is for "Citicorp Leisure Travel".