You can't just SAY you are GMAC employee (or Boeing employee or a Travel Agent with the CORRECT
IATA ID or whatever)...you have to Prove it when asked or you don't get the rate. A Rental Agent or a Manager will try to get you best rate available but won't match the rate. This happens frequently. Many friends try to say..."hey use this code, it will get you a good rate!" but in essence it's a ...