Legal Question in Wills and Trusts in California

In CA, must be notarized.

Actually, under the Probate Code Section 4121, the principal's signature on a power of attorney can be either witnessed by two people or notarized. If the power of attorney is not attorney drafted, then it is better to have it notarized. The same applies to an advance health care directive under Probate Code Section 4673.

A notary is required if the power involves real property and is going to be recorded. For other types of powers of attorney, a notary is a good idea as it makes it harder for someone to challenge the validity of the signature.