How to handle a tenant who doesn’t want to sign eviction contract

[Jerryian Francois]

Hey Bigger Pockets Family as you guys know I recently purchased a multifamily and I am now going through a situation where It was recently brought to my attention the tenant has been subleasing the other side that I rented to them . In results to this they have officially broking the lease we had in agreement I have brought this to there attention through a face to face meeting where they said they will be leaving next month on the First but won’t sign it in paper they will be leaving how do I go about them not wanting to sign the contract that they will be leaving on the date they told me verbally ????