Revision Application filing requirements: ensure complete documentation, verification, authorised representation and paper book to avoid delays. Guidelines require that a Revision Application be filed in proper format, duly signed and verified, with grounds, statement of facts, exhibits and one copy of the Treasury Challan; representation must be supported by a Vakalatnama or power of attorney as applicable and indication whether personal hearing is required. A paper book in duplicate containing Order-in-Original, appeal petition, Order-in-Appeal and other previously submitted documents must accompany the application. Specific documentary annexures are mandated for Customs drawback, short-landing and refunds, and for Central Excise transit loss and export under bond/rebate cases; illegible photocopies must be replaced by attested typed copies.