This plugin extends functionality of listed items. As an administrator of your directory site, you can allow your users to claim existing listed items if they are their owners. Then the user, owner of listed company or etc., can administer his item presentation and update its information on his own. Simple as that.
Claim Listing Element
Place this element on item detail page and fill it with proper title and information to give your users ability to claim actual listed item as theirs. After click on the button, simple form will pop-up and after registration the item will be assigned to the user automatically.