PROB §19251: (a) Any allowance or rejection shall be in writing.

(a) Any allowance or rejection shall be in writing. The trustee shall file the allowance or rejection with the court clerk and give notice to the claimant, together with a copy of the allowance or rejection, as provided in Section 1215. (b) The allowance or rejection shall contain the following information: (1) The name of the claimant. (2) The date of the settlor’s death. (3) The total amount of the claim. (4) The amount allowed or rejected by the trustee. (5) A statement that the claimant has 90 days from the time the notice of rejection is given, or 90 days after the claim becomes due, whichever is later, in which to bring an action on a claim rejected in whole or in part. (c) The Judicial Council shall prescribe an allowance or rejection form, which may be part of the claim form. Use of a form prescribed by the Judicial Council is deemed to satisfy the requirements. (d) This section does not apply to a demand the trustee elects to treat as a claim under Section 19154.