California Code, Probate Code - PROB § 4307

(a) A copy of a power of attorney certified under this section has the same force and effect as the original power of attorney.

(b) A copy of a power of attorney may be certified by any of the following:

(c) The certification shall state that the certifying person has examined the original power of attorney and the copy and that the copy is a true and correct copy of the original power of attorney.

(d) Nothing in this section is intended to create an implication that a third person may be liable for acting in good faith reliance on a copy of a power of attorney that has not been certified under this section.