My daughter moved into an apartment just off campus that requires a parking sticker. I personally put the parking sticker in the rear window of her car the day she moved in. A few months after moving in, she went out to the parking lot and found a boot on her car from UPE. She called and asked why her car was booted, and they claimed it didn't have a parking sticker on it. They apparently take video of the car before booting it, and they showed her the video. The video was taken on a walk-around of the car from all sides, EXCEPT FROM THE REAR WHERE THE PARKING STICKER WAS. Their claim was that she got a boot, went in to the apartment manager's office and got a parking sticker, then put the sticker on the car after getting the boot.
Their response was to tell my daughter to just pay the $60 in cash to the tow truck driver because that would be faster and easier than trying to deal with the hassle. I got involved. I got a copy of her application for the parking sticker from the apartment complex from several months earlier. I provided a statement that I personally put the sticker on the car window a month earlier with the same number that was currently on her car. That wasn't enough. They claimed she must have taken it off and then put it back on. I demanded that the send me a copy of the video and eventually threatened a lawsuit. After I finally got a copy of the video and pointed out the flaws and we escalated threats back and forth, they eventually took the boot off her car.
I wasted two hours of my time dealing with them for a boot on a car that was legally parked with a proper parking sticker. All though the process they kept telling me that if we'd just pony up the $60 we wouldn't have to deal with the hassle of sorting things out. Based on my experience, I have no reason to trust UPE or anything they say or do.