We have received numerous calls regarding a letter/flyer being placed on doors about painting address numbers on the curb. It is not a requirement to have this done and this is not something the City is or will ever do, it is a private individual/company providing this service. It is up to you if you want to pay to have this done.

what the person was showing, was abuse of their property, with taping some thing to the front door, thus causing house cleaning work.........

It might be a scam, or it could be legit (but obviously to be employed at your discretion). Advertising shows up in all manner of ways, after all. To quote a former President, "The business of America is business."