my dad owns a lot that is previously owned by his parents. My dad was able to get this lot by buying it back from the bank where it was mortgaged. We used it as a collateral for a loan in a lending company and is now unable to pay the remaining balance, we decided to sell the lot but the problem is my dads parents wont leave the property and claims it to be their own making it harder for us to sell the property. How can we force them to leave?
NOTE:
The title is already in my dads name
We have all the documents needed to prove ownership.