Lease Back "Rent Back" for a short amount of time? It is unclear if you are an agent or a homeowner?
In any case, if you have an agent, your agent should recommend that you execute a two month lease or for whatever term you and the prospective tenant agree.
SHORT SALE? if this is a short sale, then you will have to read your approval letter and see if the lender allows a short term (90 day) lease back. Most cases the short sale lender will not agree to have the seller remain in the property. However, anything is negotiable and this truly depends on the negotiator who handled the short sale offer.
If you have permission and you are not violating the terms of the lender contract / agreements; it is as simple as a rental lease agreement executed before close of escrows.
If you like, contact me and i will be more than happy to consult you further at no charge.
You can reach me at 949-264-2177
Realty ONE Group, Inc