PROBATE CODE
SECTION 1260-1265

1260.  (a) If notice of a hearing is required, proof of giving
notice of the hearing shall be made to the satisfaction of the court
at or before the hearing.
   (b) If it appears to the satisfaction of the court that notice has
been regularly given or that the party entitled to notice has waived
it, the court shall so find in its order.
   (c) The finding described in subdivision (b), when the order
becomes final, is conclusive on all persons.

1261.  Proof of mailing may be made in the manner prescribed in
Section 1013a of the Code of Civil Procedure.

1262.  Proof of publication may be made by the affidavit of the
publisher or printer, or the foreman or principal clerk of the
publisher or printer, showing the time and place of publication.

1263.  Proof of posting may be made by the affidavit of the person
who posted the notice.

1264.  Proof of notice by personal delivery may be made by the
affidavit of the person making the delivery showing the time and
place of delivery and the name of the person to whom delivery was
made.

1265.  Proof of notice, however given, may be made by evidence
presented at the hearing.