So when the cops show up how is it not a he said she said situation? If I “break in” to my house, they call the cops on me as a “burglar” how does the cop know how long either party has been present?
One tactic is for them to have a "deed of sale" on hand. They show it to the cops and the cops tell you to get out, and settle it in court. Never mind that real property isn't transferred quite like that, or that you have state id that matches the address. The cops just take the "deed" at face value and kick you out.
So you also pull a "deed of sale" from your backpocket and tell the cop that those guys are fraudster because you also have matching state id, while they do not.