Not to be confused with the payment method, Czech people, dictionary
definitions, etc.
Checks are people who go around "just checking" to see if your door is unlocked. Some may also check windows or other lockable areas. They'll often do this on a routine basis in a given area.
Mostly they are bottom-tier,
opportunistic burglars who, as soon as they realize your door is locked, will be gone and continue on to "check" the next one. Catching them relies on being able to notice and bait their pattern successfully.
Some may also be homeless, sex offenders, or otherwise fuckin weirdos, so it's really just best to keep your doors locked, this isn't the 1950's, people.
"Yo, is someone
trying to open the door?"
"Wut?"
"I said someone just tried to get inside
the fuckin' house!"
"Oh, those are just the Checks. Evening rounds, nothing to worry about. They're already gone."