I've always booked cars on the rental companies' sites using my Costco discount code. Recently, Enterprise/National/Alamo have all respectively stopped accepting the codes on their sites. For example, on Enterprise, I get this: "Error: We're sorry, but this account number cannot be used online. Please contact your account manager if you have questions." (I can still book on Costco Travel, which for me happens to be more complicated with my filter.) Avis/Budget still work. Anyone know what that's all about? Thanks.
