Selling Tenant Occupied - Lease Amendment?

[Zachary R.]

Hey guys- 

I placed my (tenant occupied) Austin house on the market yesterday and our showings have been positive– received an offer earlier this morning that I think we will end up accepting.  That said, we've prepared the tenants for this in advance and they've verbally agreed to move out if the property sells.  

Just to ensure that we're covering all of our bases, I'm curious if anyone has put together a lease amendment for this type of scenario prior to going under contract for the sale.  Basically, we just want to ensure that we have something in writing from the tenant that says they plan to move out and are accepting 1 months rent as compensation for any inconvenience.

I can pull something together, but thought I'd ask!

Zach