Originally Posted by
flyquiet
TSA says you may get PreCheck via NEXUS or a separate registration in PreCheck but they also give it to random people based on undisclosed criteria on single occasions, and they also omit to give it to people with NEXUS (and presumably PreCheck registration) on single occasions. They don't want people to count on not being fully screened on the day of travel.
It's not just on single occasions. I'm one of those "random" people without NEXUS (or other credentials that I'm aware of) that gets TSA Pre 100% of the time. I really have no clear idea what the mechanism is or what the criteria are that consistently identify me as someone who can bypass normal screening. I'm curious about this but I doubt it will ever be explained to me.