The change will usually also be verbal. In the event of a dispute, proof of the change can be made if: without written agreement, you cannot even prove how much the tenant owes you the rent and perhaps take you. However, with a written lease agreement, you can make certain arrangements, for example. B how and when you can check the rent or under what circumstances you can recover all or part of your tenant`s deposit. Your landlord may charge a fee for changing your lease. You can only pay yourself if you have requested the change. If your landlord questions you a change you didn`t ask for, you can ask for the money or report it to trading standards. A lease can be used for both an apartment and a house.