Canteen Stores Department refund procedure requires verification of inward supplies and bank details for claims to unit canteens. The CSD refund application requires GSTIN, tax period, refund amount, itemised inward supply details (supplier GSTIN; invoice/debit/credit particulars; rate; taxable value; tax amounts) with totals by tax type, attachment of supporting documents, and bank account particulars. It mandates an authorised representative's verification declaring goods were received for supply to Unit Run Canteens or authorised customers and that no prior refund was claimed on the cited invoices, plus signature, name, designation, date and place.