Do you know about the Certificate of Title of vehicles. Where will you send them by mail?
To the address on file. You can replace them online.
Another question regarding  proof of ownership, what about the Garageman Lien procedure?
An applicant that is using the Garageman Lien procedure must present ownership documetation that show a Notice of Lien and Sale and a Garageman Affirmation and Bill of Sale.