I went thru this exact issue 8 years ago . Yeah it's real, and it's nothing new! Way, way over a century old. Many ways that they can put a Claim on someone property too! That sucks! This is Absolutely the Property Owners Obligation to not let this CRIME happen! Fact! Believe me I know! However, beware, as it takes Time, a Bad Person, and a Scandalous Attorney for someone to be to place claim on your property. This happens a lot too, don't think it doesn't! Just as we are all busy, and don't expect things like this to happen, it does. Especially not to you, eh. Contact a good Property Attorney Immediately, Pronto! I very well knew the people who tried this on me! My Property Survey once again richly rewarded me. Plus I had a Documented Lease Agreement on the property. Too long of story to get into, but pay Close Attention to what is going on with your property, always! You will be surprised what people will try and do. Even family friends for generations! A property Survey, a Valid, Documented Property Rental, or Lease Agreements are always absolutely needed! I never liked to pay for the Property Surveys that I have, however they always seem to be Rewarding to me in time. Good Luck on this Scandalous issue!