Understanding the Costs of Doing Business as a Notary in Arizona Operating as a notary public in Arizona offers tremendous opportunities, especially for professionals like those at A Signature With A Purpose Mobile Notary, LLC, which serves the Phoenix area with convenient, mobile notarization services. However, embarking on a career as a notary or running a mobile notary business comes with a variety of required and optional costs. Understanding these expenses—both initial and ongoing—is cru...