Coming from the view point of a property owner/manager, how can you enforce no trespassing notices. I have have signs up. However I have been told that you must have notified the person(s) directly. I then created a trespassing warning report to give the person in hand. Only now I was told by a Police Officer that the notice has to be sign by the individual(s). I have read Chapter 266 Section 102 and it does not mention that it must be signed. My question is, most people refuse to sign or even provide ID. What can I do?