need help

I would guess Utah.

or look for them guys in suits, biking from door to door.

I think they are Utah's version of the mall santas.

You are going to need to elaborate more on this vague request.

Register your son at the Utah State University? The University of Utah? Brigham Young University? Kindergarten?

A driver's license? Register a motor vehicle in his name? Register your son to vote? As a Sex Offender?

I am guessing that english is not your main language.
Where are you writing from?
What do you want to register your child for?