Is it regarded as violation of personal rights to post bills on the doors of houses without permission?

I want to start work somewhere. We are supposed to distribute bills, inserts, etc. However, we are supposed to post those bills on the doors of houses. They tell me that no problem arises while doing it. Do I have to get permission from people to post bills on their doors? The bills are related to them but we post them without communicating with them. We do not have the opportunity to inform them.

Dear Brother / Sister,

If you cannot find the owner of a house, etc., and if it is a bill, notification, etc. that interests the owner, you can post it. 

A bill that is not related to them can be posted only with their permission. The external part of a door and wall is regarded as private property and cannot be used without the permission of its owner.

Questions on Islam