It is possible aliyekuuzia ndie aliyemuuzia huyo mwenzio, so you better go and see him, secondly it is possible huyo mwenzio au wewe umeuziwa na mtu ambaye hakuwa na title au haki juu ya ardhi husika, then where will you get a fair and just hearing and possibly get access to the document of your fellow for perusal? Defnitely it is in Land Tribunals, they starts at the Ward level if the subject matter is valued not more than three million, then if it exceed the case should be at the District Land and Housing Tribunal, Depending on the value, the other court is the High Court of URT. Prepare your case, exhibits and witnesses to prove your case, make sure the seller and others who can trace the root of title are there to testify, it is normal in court for the respondent to serve you thedocuments before hearing, this will give you a chance to prepare your counter evidence. THE BEST THING IS PLANNING AND PREPARATION FOR YOUR CASE