If it's done in a (legit) ski shop, then generally yes. Bindings can be a huge legal liability; if a shop fucks up the mount or adjustment, they can get a fat lawsuit slapped on them. In my experience there's a lot of paper signing that goes along with binding work.
That being said, I'm sure lot's of people just fux with their bindings without that shit.
OP: "If you suddenly skied off a huge fuckin cliff and you only had time to throw one last trick before you died, what would it be?"
Malcolm: "id probably just flail my self to death"
"If the overall quality of your film depends on what you shot it on, you aren't ready to make a film." - Barry Green