This instruction lays down uniform procedures for sanction, post-audit, and review of GST refund claims to ensure consistency and effective revenue monitoring. It mandates issuance of a detailed speaking order in all refund sanctions through FORM GST RFD-06, even where refunds are fully sanctioned, outlining verification, findings, and legal basis. Comprehensive checklists are prescribed for different refund categories, including zero-rated supplies, inverted duty structure, deemed exports, excess cash balance, and other refunds. The instruction clarifies that pre-audit of refund claims is not required, but post-audit may be conducted for refund claims of ₹1 lakh or more. Timelines are prescribed for completion of post-audit and review, with provision for creation of a dedicated Post-Audit Cell. All refund orders are required to be reviewed under Section 107(2) of the CGST Act within stipulated time limits to ensure legality and propriety.