A will generally needs more than one witness in every U.S. state that I have ever heard of. The witnesses need not be notaries, however; neither is being a notary a bar to being a witness to a will.
The attached California statutory information, relating to California Probate Code sections 6110-6113 may be helpful. I cannot vouch for its currency, however. Statutes are often read in conjunction with case law in which judges interpret the meaning of various terms. I make no representation as to any applicable case law.
Consult a California lawyer if you need legal advice. This is not legal advice as I do not hold California licensure or practice law there.Ask a similar question
You need at least two disinterested witnesses. The mechanics of executing a Will must be strictly followed. A Will can be witnessed by a notary but an acknowledgement is not necessary and an acknowledgement would not substitute for either or both of the required two subscribing witnesses.
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