My granddad had to fight a case for more than 30 years because the tenant wouldn't leave. 30 fucking years just to get back a house which he bought. The only mistake he made was buying the house with the tenants still inside. They even went onto to take the deal outside the court where we would pay 1/4 of the house price to make them leave the house.
Indian legal battles stretch for so long that many times people die without hearing a judgement for the case but my granddad was lucky enough to get the house back a few years before he died.