They even have the re-key setup on the smart locks. 

.: The post office will typically rekey the mail box when a new tenant is placed.

If you really want her out, I'd tell her if she leave before the end of this month and the place is in good condition, that you will return her deposit AFTER she is out, given you the keys and you've inspected the place...and as Colleen says, be there with a locksmith or new set of locks to change the locks.Then once she's out, you can try going after her in small claims court for the unpaid rent.

Thanks for the update,  I went back to the property that I have a listing agreement for and it appears to have been rekeyed by Safeguard. 

Once that is complete, allow them to work things out as long as you get the keys to rekey if you will (and I would) near/at the end of the month. 

A call to a locksmith should have been enough not to mention the PM should have had another key. 

Hello Ryan, these are some of the kinds of tasks I am thinking about for Boots on the Ground.Lockbox installationKey duplication, meeting locksmiths, digital lock code changesMeeting cleaners, landscapers, tradespeopleProperty walk-throughs via phone and/or video conferencingMove-in and move-out inspectionsPlacing signage on propertiesPhotos and videosScheduling contractors and tradespeople for vacant propertiesStatus reports on contractor/tradespeople progressProperty drive by

I took over the management of our portfolio while living overseas, and found one of the most challenging pieces of management was finding someone to do an easy task (photos, move-out inspections, meeting a locksmith, etc.).

It is the large community mailbox and you usually have to pay to rekey the whole thing for security issues.

She paid the locksmith with a check that of course bounced.