A SURVEY is NOT a SOLUTION, read the BOTTOM PARAGRAPH!!! MIssing the point. Solution excessive $$ !!!!
Simple tresspass is a violation. If person gains entry through a fence or similar RECOGNIZED barrier, it becomes criminal tresspass and that is a misdemeanor. TRUE, Sheriff won't ticket someone for a violation unless witnessed by deputy. You can sign an supporting affidavit but in essence you are making the arrest. Best to avoid that scenario. For each complaint, sheriff must file incident report and a CR# is assigned. It is proof of a complaint. It is how sheriff pads crime stats to increse funding . Around here DEC cops are scarce. You can also go see the local justice of the peace. You can file an "information" w/ the court directly, bypass the sheriff, and the judge will then be oblidged to issue an arrest warrant. Then the sheriff must execute the warrant or be held in contempt. I still advise a court ruling to provide disposition of the matter. If this fellow ever lays claim to your property USE,, you will be in court, like it or not. Better to be the plaintiff than defendent. Small claims ms is still the least hassle in remedy. Civil vs criminal disposition, but both work.
PLS survey filed w/ county is fine. Does NOT protect you from adverse possession. There is NO dispute who owns it and pays the taxes. The scenario is that the "squatter" has legal right to use land in question if undisputed for seven years. USE can be liberally defined. He can park equipment on it, use it for storage, come and go at will, he uses it, you pay for it, And if his possessions are damaged while stored on your squatter annexed property, the squatter can attach YOUR insurance to cover his loss, welcome to the USA.
Why buy the cow if the milk is free. Spending the OP's money getting excessive, small claims action, $20 bucks + survey cost. AND only disputed boundary requires survey, not entire parcel.