I feel like you are changing the subject. You cannot claim to be Donald Duck and have it notarized. I was talking about a notary attesting to a human man or woman signing in front of him or herself in the official capacity of a notary.
To avoid arguing about your definition of common law, I like Black's Fifth. Here in Colorado we have such standing from the Territorial Laws of 1861 as found in the State Archives:
...or from the judgments and decrees of the courts recognizing, affirming, and enforcing such usages and customs; and in this sense, particularly the ancient unwritten law of England.