A good criminal defense lawyer in Baltimore MD will tell you that a ‘NO TRESPASSING’ sign must be posted where it should be seen by the public in order to subject a violator to penalty.
However, a sign is not always necessary. One can be convicted of trespass, where there is no posted warning.
If the property is marked off with painted markings conforming to regulations espoused by the Department of Natural Resources, and are made on trees or posts at entrance points, and along public areas adjoining the private land, this constitutes sufficient notice the land is private, and entry is not allowed. Moreover, if the land is considered cropland, no sign may be required.
-This Article was updated by Eric Kirk on 2/5/20.