The cost to become a notary is typical $100 to $200. To become a notary in all 50 states, you must pass a series of background checks. These include a review of your birth certificate, the FBI national criminal database, and driving records. After you pass the background check, you must take a federal and state notary exam, which you can take online. After passing the exam, you must take the Oath of Office, then use your own signature stamp. In addition to fees, additional training may be required to perform your duties as a notary. For example, an attorney and a notary may not sign documents for same-sex marriage or non-resident alien marriages. Notaries also may not perform legal or commercial transactions involving land, securities, or vehicles.