CA Prob Code Section 8481

(a)

A bond is not required in either of the following cases:

(1)

The will waives the requirement of a bond.

(2)

All beneficiaries waive in writing the requirement of a bond and the written waivers are attached to the petition for appointment of a personal representative. This paragraph does not apply if the will requires a bond.

(b)

Notwithstanding the waiver of a bond by a will or by all the beneficiaries, on petition of any interested person or on its own motion, the court may for good cause require that a bond be given, either before or after issuance of letters.