A California notary is commissioned by the state, not by a county, so the authority to act runs statewide. The county filing serves a different purpose: the oath of office and the bond are filed with the clerk of the county of the notary's principal place of business, which establishes a local record where the bond can be found and a claim made against it. That filing determines where the record lives, not where the notary may work. The distinction is worth holding clearly because it cuts both ways — a notary whose bond is filed in Fresno County may perform acts in San Diego, and equally, moving the principal place of business to another county requires a new oath and bond filed in that county even though the commission and its authority are unchanged. What never matters is where the document will be recorded or used; the notary's location at the time of the act is the relevant fact, and it must be within California.