When I worked at Rose’s, a local department store, we had to carry the rifles/shotguns out of the store for the customer, but once we were out on the sidewalk, we simply handed the merchandise over to the customer, thanked them, and headed back inside.
Prior to this I got all my stuff from an old friend, gunsmith and licensed dealer. Before he died recently and suddenly, he'd just wave bye-bye as I let myself out the door of his store. I guess, therefore, this is not a mandatory procedure for all dealers, huh?