Claims by financial creditors: electronic proof of claim and specified documentary evidence required to establish debt in insolvency proceedings. Claims by financial creditors must be filed electronically in Form C with the interim resolution professional, with supplementary documents permissible before the committee is constituted. Debt existence may be proved by information utility records or by a financial contract with supporting financial statements, drawdown records, financial statements showing non-repayment, or a court or tribunal order adjudicating non-payment.