One of the "extras" I do for many of my executive portrait clients is to shoot and deliver a new visa and passport photo. Simply put it will be the best one they will ever have. I can't tell you how many times I get a call from an assistant needing this shot in the next 24 hours. When you book and shoot with me, that is not a problem as this shot is covered. It has a very specific required format that the US government dictates: no glasses, no smile, square format, hair behind the ears, etc.
Pro tip: Shoot this first in the studio session to help the client settle in and settle down for the photo session.