Not all states allow credible witnesses, and some states like California have odd rules for credible witnesses. I also have opinions about credible witnesses as I used them frequently.
Some states that allow credible witnesses require only one witness. One that knows both the signer and the Notary.
Some states don’t allow credible witnesses at all
While other states allow the use of two credible witnesses who both know the signer but do not know the Notary. Or one credible witness who knows both.
The problem is how credible witnesses are used. Credible witnesses are normally used when the Notary gets to a Notary appointment and the signer has no ID. Or sometimes the ID has the wrong name. Hurry, get a credible witness or the notarization is over! So, you grab a neighbor, or coworker who swears they know you well.
The problem is that knowing you as a neighbor is very different than knowing you well enough to have your middle name(s) memorized.
You could test a credible witness out and ask, “What is this man’s middle name?” If they don’t know it, I would not think of them as a credible or reliable source of information. The law might allow you to use them but does it really make sense. They are just going along with whatever middle name the signer claims to be.
Or, you could use your judgement while picking credible witnesses. Personally, I feel that a family member or spouse is a quality choice for a credible witness as family members will know the other family members middle names. But, my friends who I’ve known for 30 years I do not know their middle names — sorry to say.
Additionally, in California, the credible witness has to swear that the signer cannot easily obtain an identification acceptable to the state of California such as a driver license, passport, etc. So, if the signer has an ID, but the names do not match, it would be bending the law to use a credible witness in that situation. If you don’t believe me, read page 12 of the 2017 California Notary Handbook.
All in all, I would say that using credible witnesses as a way to get out of a bind is something that should only be done if the credible witness really knows the person intimately and knows their middle names intimately off the top of their head. Otherwise you are just finding loopholes. And God forbid if you don’t take journal thumbprints you are asking for a court case and an FBI investigation! Be cautious as a Notary. It is easy to get in trouble and big trouble!>