They actually can go door to door in France! And the fine for having lied is quite unpleasant.

Not that they have time to anymore since almost every single public service got their budgets slashed.

No detection vans in Japan but the door knockers are persistent as hell and not beyond making people feel unsafe in their homes.

The worst part is the intercom systems which are standard in every home. Not only do you hear the doorbell and the knock, but they get to broadcast their face directly into your private space! (I have since disabled the camera / audio feed but it spooked me more than a few times!)

Also sellers must declare to tax administration to whom they sold TV sets. The administration sets the checkbox for you automatically ;)

They might not come, but they will send you a letter to ask you if really, really, you don't have a TV.

Yeah, this is the same as how it worked in UK (still works? I dunno). I didn't have a TV growing up, bought one when I was about 14 thinking I was being sneaky about it, address was taken when I was buying it and obviously some box got checked on some system somewhere and my parents got bombarded with letters.

They do come for a surprise visit if you tick the box in France. Used to, at least, circa 2009.