Fake case to take possession of land property.

Hi, I own a land property in Bangalore and legally registered under my name since 2012. Recently a far relative of mine has painted a case number on all sides of the property. Based on the sources, he has been trying to send me a legal notice saying that I collected some advance money in June 2015 for selling the property and have not executed the sale despite several follow ups. All of these are fake stories as the property was never on sale. I don't know if he has faked my signature or forged any sale deed. I am planning to either sell the land or build a house in the next year or so. Could you please let me know how I can deal with such fake case? Note that I have a phone call recording where he says that he is faking the case due to some personal settlement between him and my parent. Appreciate if you could get back with below questions: 1. Can I file a criminal case against him for forgery and trying to snatch the property from me illegally? 2. Is he or the court allowed to paint the property with case number which is now causing hindrance in selling the property. Also, will this cause any issues if I have to borrow loan to build a house there? 3. If he has forged my signature or sale deed, how will the court check its authenticity? Thanks, Anonymous