Need verbage for buying a property w/tenant & notice to vacate

[Shari Posey]

I've got a buyer buying a duplex and the seller will give 60-day notice to vacate when the buyer removes all contingencies. Obviously, the current lease is between the current owner and tenant. It will not protect the buyer if there is any trouble with the tenant vacating after they become owners. I'm trying to come up with some document that names the new owners in the notice to vacate. Help!