When using a code that might get you popped for an ID, look for codes out there that include "friends and family." There is a killer realtor code out there I used for Enterprise a while back and you can even print the brochure for the realty company that the code comes from, it says, "share our code with your friends, family, and clients." It was a good code and there is no way to verify if I was a "friend, family member, or client" of that company.