Concur is the preferred booking method for rental cars, and the UA P-Card is the required method of payment. However, we understand that there may be issues with presenting the physical P-Card when picking up the vehicle (for example, when UA guests arrive at the Birmingham airport for a campus visit). The best alternative is to contact National/Enterprise and set up a billing account for your department. The instructions for doing this are listed in National Car Rental and Enterprise Rent-A-Car Reservation Guidelines on the Purchasing website. When billed, the department can then use the UA P-Card to pay for the car rental.