TaggedBack.com is a free service where you register and then catalog your belongings. It allows for a simple way to keep track of the things that you own. If you lose an item that you have tagged, the person who finds it will see the tag, prompting them to go to the TaggeBack.com website. Upon entering your tag number, they will be able to notify you immediately via email and text message if you verified your phone number. The person who found your item never sees your email address unless you choose to reply to them.