We are inthe possesion of 50 year old business shop, rent regularly deposited but no receit was given?

we were depositing on good relation and faith now he wants to vacate his permisses from me and i dont want to. how can i save my permisses and my regular tenacy legaly. we have eletric bill, phone bills and some other doents shows that we are in the possesion since 50 years.