I'm living in Vancouver and would like to rent a car and go on a road trip with a friend from Seattle. Local car rentals usually allow at least one extra driver for free, but the standard requirement is for both drivers to show up at the rental desk. In my particular scenario this is inconvenient as I want to pick up a car at YVR airport and head down to Washington to go pick up my friend.
Is it possible to somehow circumvent this requirement and have the second driver be added to the insurance without showing up in person? Question is limited to major car rental companies in North America to reduce the scope.