Yes, but with rules and at your expense!. You need a non-keyed turnlock on the inside of the door (single cylinder deadbolt).

We do not want locks in the door knob as they can be accidently be locked when leaving. We need a copy of the key, labelled clearly and mailed to us. If there is a deadbolt in the door already, you may get it rekeyed, as long as you use a single cylinder. Single cylinder means keyed on outside, turn key on inside.