(1) In any proceeding involving a holder under ss. 120.569 and 120.57 in which an audit agent or investigator acting under authority of this chapter is available for cross-examination, any official written report, worksheet, or other related paper, or copy thereof, compiled, prepared, drafted, or otherwise made or received by the audit agent or investigator, after being duly authenticated by the audit agent or investigator, may be admitted as competent evidence upon the oath of the audit agent or investigator that the report, worksheet, or related paper was prepared or received as a result of an audit, examination, or investigation of the books and records of the person audited, examined, or investigated, or the agent thereof. (2) If the records of the holder that are available for the periods subject to this chapter are insufficient to permit the preparation of a report of the unclaimed property due and owing by a holder, or if the holder fails to provide records after being requested to do so, the amount due to the department may be reasonably estimated.