Section 1416 Of Article 2. Means Of Authenticating And Proving Writings From California Evidence Code >> Division 11. >> Chapter 1. >> Article 2.
1416
. A witness who is not otherwise qualified to testify as an
expert may state his opinion whether a writing is in the handwriting
of a supposed writer if the court finds that he has personal
knowledge of the handwriting of the supposed writer. Such personal
knowlegde may be acquired from:
(a) Having seen the supposed writer write;
(b) Having seen a writing purporting to be in the handwriting of
the supposed writer and upon which the supposed writer has acted or
been charged;
(c) Having received letters in the due course of mail purporting
to be from the supposed writer in response to letters duly addressed
and mailed by him to the supposed writer; or
(d) Any other means of obtaining personal knowledge of the
handwriting of the supposed writer.