LOCKS - Achaea Online Help

7.6 LOCKS

Doors may contain up to six locks, and each lock is capable of having a
separate key. If you own a structure that has a door, and you would like a
lock added to that door, or you would like an existing lock on that door
changed, you will need to speak to your Patron.

No kind of furniture (see HELP FURNITURE) may have locks, nor be lockable.