Give the tenant on the lease a notice to vacate on the grounds of violation of lease terms and make sure you drop a paper copy at the door.
You can let the subletters know they can apply for the apartment and meet he same requirements as everyone else, but they can’t just stay there.
Not allowing subleasing is SO important! I know we don’t want more vacants but we have to know if they meet our criteria. Ultimately, I believe it’s a fair housing issue