2009 California Probate Code - Section 1020-1023 :: Chapter 2. Petitions And Other Papers

1020.  Except as provided in Section 1023, a petition, objection,
response, report, or account filed pursuant to this code shall be in
writing, signed by all of the petitioners, objectors, or respondents
or by all of the persons making the report or account, and filed with
the court clerk. Verification of a document shall constitute
signature of that document, unless expressly provided to the
contrary.

1021.  (a) All of the following shall be verified:
   (1) A petition, report, or account filed pursuant to this code.
   (2) An objection or response filed pursuant to this code to a
petition, report, or account.
   (b) Except as provided in Section 1023, the verification shall be
made as follows:
   (1) A petition shall be verified by the petitioner or, if there
are two or more parties joining in the petition, by any of them.
   (2) A report or account shall be verified by the person who has
the duty to make the report or account or, if there are two or more
persons having a duty to make the report or account, by any of them.
   (3) An objection or response shall be verified by the objector or
respondent or, if there are two or more parties joining in the
objection or response, by any of them.

1022.  An affidavit or verified petition shall be received as
evidence when offered in an uncontested proceeding under this code.

1023.  If a petitioner, objector, or respondent is absent from the
county or for some other cause is unable to sign or verify a
petition, objection, or response filed pursuant to this code, the
person's attorney may sign or verify the petition, objection, or
response unless the person is a fiduciary appointed in the
proceeding.