In Arizona, a notary public is not required for a standard bill of sale form when selling personal property such as vehicles, boats, or other items. While a bill of sale is generally valid without notarization, there are situations where it becomes a wise precaution.A dealer employee will sign the MCO with their title (i.e. Title clerk), Notarization is not required. Library File Link. 48-2004. Purpose. Arizona law states that a notary public isn't necessary for a bill of sale. This regulation simplifies vehicle ownership transfers in the state. To have a car bill of sale notarized in Arizona, both the seller and buyer need to be physically present in the notary office. Apply for a title within 15 days of purchase and take the application to an MVD Office or Authorized Third Party provider to complete the process. Both parties must sign the bill of sale in the presence of the notary.