California

For California, execution requirement is The power of attorney is either (1) acknowledged before a notary public or (2) signed by at least two witnesses who satisfy the requirements of Section 4122; statute is Cal. Prob. Code § 4121, recorded from its source on 2026-09-02.

Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.

What the source says

A power of attorney is legally sufficient if all of the following requirements are satisfied: (a) The power of attorney contains the date of its execution. (b) The power of attorney is signed either (1) by the principal or (2) in the principal’s name by another adult in the principal’s presence and at the principal’s direction. (c) The power of attorney is either (1) acknowledged before a notary public or (2) signed by at least two witnesses who satisfy the requirements of Section 4122.

— leginfo.legislature.ca.gov, retrieved 2026-09-02

Where each value comes from

The value above is stated away from the sentence quoted with the answer, so the passage that states it is shown here too.

— all from leginfo.legislature.ca.gov, retrieved 2026-09-02

Source

• leginfo.legislature.ca.govhttps://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=4121.&lawCode=PROB

Last verified against source: 2026-09-02. Due for re-check by 2028-09-01. This page as Markdown · OKF bundle · full dataset as JSON.