Mutual lease term between landlord and tenant

[Keith Smith]

I'm curious if others have a tenant sign something when terming a lease early? In my situation, I have a tenant who moved out and said they couldn't afford rent thus breaking their lease. Obviously, they will not be getting their SD back but they did leave the place in great condition and cleaned. So I don't want to take any further action against the tenant other than to move on. Do you all have them sign paperwork stating the lease is terming early?