When you need the original: If you're selling your old clunker or disposing of it at a junkyard, you'll be asked for proof of ownership to verify that you didn't heist the car. You'll also need the title if you want to transfer ownership of the vehicle.
How to replace it: Walk into your local DMV (or go online) and fill out an Application for Duplicate Title. You should receive a new title in three to four weeks.
Cost: $20 to $30, depending on your state.
Last updated December 31 2007: 8:33 AM ET