About as binding as your sublease was. :p

The distinction doesn't matter much though. The remedy if your tenant doesn't vacate when they agreed is eviction. The remedy for getting a tenant out for not paying is eviction. Either way, the tenant doesn't get the cash and gets an eviction filing on their record, which they presumably want to avoid.

Hopefully you weren't asking in the other direction. But yes, if your check bounces, they could come after you in court for the money, or even for damages for an illegal eviction.