Q: Do I always need a notary for my Texas bill of sale? A notary is no longer required to transfer title To a vehicle in the State of Texas.Forms and instructions are on the Texas DMV website. Who is eligible to become a notary public? How do I become a notary public? Most states in the US do not require a notary or public official to witness and authenticate the signing of a bill of sale. Depending on the type and the intended use of the BOS in Texas, it may or may not require notarization. In the state of Texas, a bill of sale is not required for transferring the title.