Contact your DMV. Explain that you would like to remove the second party from a vehicle's title record and provide the customer service representative with any pertinent information concerning the transfer.
Obtain and fill out any forms necessary from the DMV. Depending on your particular situation, you may need to provide the DMV with additional paperwork, such a divorce decree, quit-claim deed, death certificate, will and/or a notarized form signed by the co-owner, giving the DMV permission to change the title.
Go to the DMV office and supply the necessary documentation and/or affidavits for the title transfer. Bring the co-owner with you to the DMV if required and possible. Having both parties present may expedite the process and reduce the chances of possible hold-ups.
Pay any fees associated with issuing the new title and vehicle registration. Make sure to update any name or mailing address information, if needed.
Allow a sufficient amount of mailing time for the new title and registration forms to arrive. Store the new registration in the vehicle and secure the title in a safe place inside your home or in a safe deposit box to complete the process.