Typically in an apartment, the boxes are landlord owned and the landlord is responsible for keying and rekeying after a tenant leaves.

If so just rekey the place, take it out of their security deposit, and move on.

If they changed the locks, you need to call a locksmith. 

Saved me from having to get a locksmith out while I was 6 hours away.Really all you are left with after these tools is guest communication and any maintenance.

One of the things they do, when managing a property, is rekey the home so they and the tenants are the only ones who have keys.

One unit turnover usually costs at least a month’s rent after the property manager charges their inspection, rekeying, turn repairs, and placement fees.

Lock Smith 4.)

We already rekeyed the entire house months ago.

Where you put this little key in the side of the lock and you can rekey it by just putting in the current key, and then sliding in the new key.

We are in Texas too so by law, we had to post a 3 day notice to vacate (even though she was already gone), then we had to pay the re-key guy, the lawn guy and the cleaning staff to get the place ready to list on March 8th.