http://www.tennessee.gov/safety/T%26RFAQs.html
That is the site I found this info on:
5. QUESTION: How can I get a duplicate title:
ANSWER: An application for a duplicate certificate of title may be filed through the Title and Registration Division either in person or by mail. Office hours for this service are 8 a.m.-3:30 p.m. When filing in person, you must furnish proof of identity, such as a driver license or photo identification card. If someone other than the owner of the vehicle files, they must show proof of identification and have a notarized power of attorney from the owner. If filing by mail, the Certification for Duplicate Certificate of Title, Form SF-0964, must be completed in its entirety and forwarded to our office with the fee of $5 and any discharge of lien if applicable. This form is available at county clerk offices or a written request for the form can be sent to Title and Registration Division, 44 Vantage Way, Suite 160, Nashville, TN 37243-8050.