http://update.uo.com/design_20.html
Selecting Co-owners
* Other characters on the same account as the house owner will be treated as co-owners unless:
o They are already an owner or co-owner of another house.
* You may select up to eight characters to be co-owners:
o A co-owner may not be the owner of a house.
o A co-owner may not be a co-owner of another house.
Co-owner Features
* Co-owners will be able to do everything that an owner can, except:
o Transfer ownership of the house.
o Re-deed a house.
o Add another co-owner.
o Change the house locks.
* Co-owners can also place one secure container, called a "strongbox".
o To place a strongbox the co-owner must say, "I wish to place a strongbox". The strongbox will appear at your feet.
o The strongbox can only be accessed by the co-owner who placed it and the owner of the house.
o A strongbox can hold up to 25 items and has no weight restrictions. Note that the strongbox is a secure container, but items in the box do not count against the total number of lockdowns for that house. These strongboxes are additional storage.
o A strongbox belonging to a co-owner that is removed will become unsecure (and subject to decay) as soon as it is accessed again.
o Other characters on the same account that are being treated as co-owners will NOT be able to place a strongbox.
So co-owners should be able to
a) Place deeded items in a house (like forges/anvils).
b) Place a leet Strongbox.
c) Should not be able to own or co-own any other house.
I know this was brought up in a thread somewhere before, but I'm not sure why it was dismissed?