(a) Be in writing.
(b) Describe the nature and the amount of the claim, if ascertainable.
(c) State the name and address of the claimant and any attorney for the claimant.
(2) A defect of form of a claim timely presented may be waived by the trustee or by the court.
(3) Upon demand of a trustee, a claimant must produce any written evidence supporting a claim made under ORS 130.350 to 130.450 and account for any written evidence supporting a claim that is not produced. [Formerly 128.268]