As @LindaH-FL kindly suggested above, a brief Search of the Notary Cafe database (a GOLDMINE) will provide you with great insights, information, & clarity regarding this business sector & the direct experiences of others. The research you engage in will also guide you in further developing your critical thinking processes . . .
I performed a cursory Search of the database utilizing the ever-elusive, nearly-invisible Magnifying Glass for the keywords “certified mobile notary service” you supplied and found this critically important thread:
I do certainly echo the insights/advice provided by LindaH-FL & Arichter.
======
To help you locate the Magnifying Glass, I have inserted an image below.
