example:
Joe store put the info about of the company if another user (ex. Fred) want update this info an message show up "You are not the owner of this send an message at the webmaster if the info of the store of you have read is incorrect" then when the admin see the "update info" into of admin area read only the real owner update and not the update not owner user. is important store the ip of submitter for prevent abuse of the system.
Another the "free" submission is important of dont have the "email" & "map" button because is unverify submission the "pay" service have give the ok for use the "email" contact from the website (antispam & privacy protection).