No lease provided after closing

[Jason Thomas]

A co-worker just asked for help regarding the fact that he never received a lease for either units of his duplex after closing. Aside from the fact that his lawyer or RE agent should have been on top of that, is there any advice to the new owner to get his hands on a lease? Can he start the eviction process or create a new lease for the existing tenants if they do not have anything currently in writing?