Tenant refuses to pay rent
When you have a month-to-month tenancy, either party may terminate the lease at any time, provided that the terminating party has provided a full month’s notice of intent to terminate the lease. In other words, if he told you on May 30th, the 30 day period begins to run on June 1st, and he is responsible for June’s rent. If your tenant advised you on June 1st that he is terminating the lease, the 30 day period does not begin to run until July 1st, and he would be responsible for both June and July’s rent.
Your recourse would be to file a civil action against him for monetary damages under a theory of breach of lease agreement.
Best of luck.