2 Names on auto title, no lein, no "and" / "or" on title both need to sign?

Question

I recently had some help from my father to purchase a new vehicle, and I need to get rid of it to get some money for bills, and buy a cheaper vehicle. There is no lien on it, but his name and mine are on it. I know if it has the "and" / "or" what to do, but if it doesn't have either one......how do you work that? does he still have to sign the title? Or, can I just sign it? My name is listed first, and his second. Please help ASAP! We are in Texas

Answer 1

No matter what, if there's no 'or', both need to sign off  

Answer 2

I've never heard of having two names listed without an "and" and without an "or" but if you came to my DMV window, I would require both signatures

Answer 3

Yes, in TX if there are two names on the title you ALWAYS have to have both signatures to sell the vehicle.  TX does not put and/or on their titles.