No trespassing signs can be useful to property owners—especially on large tracts of land or land that is not developed—to put persons entering the property on notice that the property is private property and if they do not have permission to enter, they may be committing civil and criminal offenses related to trespassing. In some states notice is required for a trespasser to have civil or criminal liability for entering the property without permission.

No trespassing signs may also protect a landowner against liability to a trespasser, as a lower duty of care is owed to trespassers in some states, and putting a person entering the property on notice that they are trespassing may strengthen the property owner’s defense against any liability claims if the trespasser is injured on the property.

In Nebraska, property owners can use 'no trespassing' signs to deter unauthorized entry and reduce liability risks. Nebraska law recognizes the importance of such signs to notify individuals that they are entering private property. Under Nebraska Revised Statute 28-520, trespassing is defined as entering or remaining on property without authorization from the owner or occupant. The presence of 'no trespassing' signs can serve as clear evidence that individuals have been warned and are not permitted to enter without consent, thus establishing the basis for civil or criminal trespass charges. Additionally, Nebraska follows the general rule that landowners owe a lower duty of care to trespassers than to invitees or licensees. By posting 'no trespassing' signs, landowners may strengthen their defense against liability claims should a trespasser be injured on their property, as the signs demonstrate that the trespasser was not invited and entered the property at their own risk.