CA Prob Code Section 2619

(a)

On petition of the guardian or conservator, the court may issue a citation to a person who has possession or control of property in the estate of the ward or conservatee to appear before the court and make an account under oath of the property and the person’s actions with respect to the property.

(b)

Disobedience of a citation issued pursuant to this section may be punished as a contempt of the court issuing the citation.