No Trespassing Signs and Purple Paint Laws for Landowners

Posting means marking your land so people know they need permission to enter. A number of states let you do that with purple paint marks as well as signs, but the rules for where, how high and how often differ. Check your own state’s statute or wildlife and agriculture agency before you pick up a paint can.

What is posting, and why does it matter?

In many states, notice affects how trespass is enforced. If a person knowingly enters land that is properly posted, they may face a clear legal violation. If land is not posted or fenced, some states treat entry differently, and a visitor may argue they had no way to know the land was private.

Other states require permission to enter no matter what, and posting is only evidence. The takeaway is that you should not guess what the law in your state requires. Treat posting as a way to remove doubt, even where the law does not make it mandatory.

Signs, paint and fences: what counts?

Landowners generally use some mix of the following.

• Signs. Printed “No Trespassing,” “Private Property” or “Permission Required” signs are the most universally understood way to post.
• Purple paint marks. In states that recognize them, painted marks on trees or posts can stand in for signs. They are cheaper and last longer than many signs, and they work on a tree that will outlive a metal sign.
• Fences and gates. A fence says private to most people. Whether it counts as legal notice depends on your state.
• Verbal or written notice. Telling a person directly to leave, or giving them written notice, is a separate form of notice and is often effective in its own right.

Do purple paint marks count as legal posting?

Yes in a number of states, no in many others. Where purple paint is recognized, the statute usually spells out how the marks must look, such as their size, how high they sit and how far apart they are, and what they must be placed on.

Do not rely on a summary from the internet or a hardware store. Read your state’s statute, or ask your state wildlife agency, agriculture department or a local conservation officer which rules apply. If you live in a state that does not recognize purple paint, a purple mark may carry no special meaning, so use signs.

What changes when land is unposted?

It depends on the state. Some states treat entry onto unposted, unfenced rural land more leniently than entry onto marked land, particularly for hunting and fishing. Others require permission regardless, and ignorance of the owner’s wishes is not a defense.

From the owner’s side, an unposted tract is also harder to enforce, because you may have to prove the visitor knew the land was private. If you have had repeated trouble, posting and a documented warning can help when you ask law enforcement to act, though what they can do depends on your state and local rules.

Readers who are hunting, hiking or foraging should see our guides on whether you can hike on private land and how to tell if land is public or private. They explain why guests should ask first, whatever the posting.

Where to place signs and marks

• At every corner and at changes in direction of the boundary.
• At every road, driveway, lane and gate that enters the property.
• Where trails, old logging roads and field edges cross the boundary.
• At water access points, such as creek crossings, boat launches and pond banks.
• Along the road frontage, facing the road, so travelers can see them from either direction.
• At any other place where people commonly enter, which you can often learn from tracks, trash or trail camera photos.

Place them where a person approaching can see them from a reasonable distance, and face them outward. When in doubt, add more, because a missing sign is more often the problem than an extra one. If your state’s law sets spacing or height, follow that exactly.

Posting land that allows paid access

Many owners post their land as private but still sell access. That works as long as the message is clear: the land is private, and entry is by permission only. Signs that say “Private land. Access by permission or reservation only” help guests understand that a no trespassing sign does not mean paid access is unavailable.

Place a sign at the main entrance that points guests to the official entrance and parking area. Then make sure your listing and your rules say the same thing. Our guide to writing rules for guests shows how to word the entrance and boundary rules, and our guide on how to list your land on WildPass covers the required entrance and parking markers.

Here are a few plain sign wordings, to adapt to your state’s requirements and your own situation.

• “Private land. No trespassing. Entry by written permission only.”
• “Private property. Access by reservation only. Entrance and parking are at the marked gate.”
• “Hunting, fishing and foraging by permission or reservation only. Posted by the landowner.”

Written permission is a separate layer. A ticket, a signed agreement or a message that confirms the date and area is evidence that a person was allowed on your land, which also helps you tell invited guests from uninvited ones.

Know your boundary before you post it

A sign in the wrong place causes problems with neighbors, and it can mislead guests. If you are unsure where your line runs, find out first.

• Survey and corner pins. Look for surveyor’s stakes, pins or monuments at the corners, and for a recorded survey at the county office.
• Online parcel maps. County GIS maps and phone apps are useful for a rough idea, but they are not survey-grade, and lines can be off.
• Disputed lines. If a neighbor disagrees about the line, a licensed surveyor can settle the facts before you post, and a local attorney can advise on any legal dispute.
• Shared boundaries. Talk to the neighbor before painting or posting along a shared line. A friendly conversation often prevents a long feud.

Whatever you do, stay on your own side of the line. Painting or posting a neighbor’s tree, even by accident, can start a dispute and may create legal problems of its own. When a boundary runs through woods with no obvious markers, walk it with the neighbor if you can, and mark conservatively inside your property.

Maintain, document and keep it consistent

1. Walk the boundary at least once a year, and after storms, to replace signs that are missing, faded or knocked down.
2. Refresh paint marks as they fade, and keep the pattern consistent with your state’s rules.
3. Photograph signs and marks with dates, so you can show what was posted and when.
4. Keep a record of trespass incidents, with dates, photos and any report numbers.
5. Review your posting when you change how you use the land, such as when you add paid access or a new trail.

A few mistakes come up again and again.

• Painting purple marks in a state that does not recognize them and assuming that settles the matter.
• Posting only the main road while leaving field edges, trails and water access unmarked.
• Putting signs on the wrong side of the line, or on a neighbor’s tree.
• Letting signs fade, then trying to enforce against someone who says they never saw one.
• Using a “No Trespassing” sign on land you also invite guests onto, without giving those guests clear entry instructions.

If someone ignores your signs, resist the urge to confront them yourself. Take photos from a distance, record the time and any license plate, and contact your local sheriff or conservation officer. Our guide on what to do when a guest breaks your rules covers the same calm approach for invited guests.

Posting is one layer. Fixing hazards, setting clear rules and carrying proper insurance cover the rest. See our guide to making your property safe for guests and the host guide for how those pieces come together. Our guide to recreational use statutes explains why posting and written permission matter for liability as well as for trespass.