If notarization is necessary, both parties must sign the document in the presence of a notary public. Importance for Both Parties.A notarized bill of sale is a document that records the legal transfer of any type of personal property (vehicle, boat, etc.) from a seller to a buyer. If the property being sold is of significant value, the parties may wish to seek out a notary public to witness their signing. For notaries commissioned or recommissioned on and after January 1, 2016, the seal must also contain the notary public's Secretary of State ID number. The Texas Bill of Sale in 2024 is crucial for secure and compliant transactions. This form must be filled out within 30 days after the BOS's notarization. Which are The Requirements for a Business BOS. Q: Do I always need a notary for my Texas bill of sale? This article explains what it means to sign a document in front of a notary.