If you want things to go properly, do not rely on the sales department.
The new cars get a (PDI) pre delivery inspection which is handled through the Service Department.
Your best bet is to talk with the Service Director or Manager (give him your vin # and car color) in advance of the car arriving at the dealership. Usually the service department must write a repair order in order for the PDI to be done on a car. Sometimes a car detail person may be the one to install the plate frame ? Find out who actually does what at your Dealership and in what order. Don't rely on the Sales Department to relay your concerns properly and at the right moment.