MtM tenant won't respond

[Sean Kelley]

I have a tenant in a triplex that I recently purchased who does not have a LT lease and has been paying month to month.  Last month, only paid 70% of rent and has not paid the rent this month (due on May 1) and it is already May 9.  They are supposed to move out by the end of the May but has stopped responding to my phone calls or texts.  How can I ensure they move out?  No lease and they are delinquent in rent.  Maybe give them notice that locks will be changed in a week?