California Code, Probate Code - PROB § 9251

(a) Immediately on the filing of the allowance of a claim, the clerk shall present the claim and allowance to the court or judge for approval or rejection.

(b) On presentation of a claim and allowance, the court or judge may, in its discretion, examine the creditor and others on oath and receive any evidence relevant to the validity of the claim. The court or judge shall endorse on the claim whether the claim is approved or rejected and the date.