Manual processing of zero-rated refund claims provides procedures and timelines for filing, provisional and final sanction. Manual processing of refund claims for zero-rated supplies is required until the portal module is available: export refunds via shipping bill are deemed applications upon filing export manifest and valid FORM GSTR-3/GSTR-3B; other refunds (including refunds to SEZs and unutilized ITC) require FORM GST RFD-01A printouts and supporting documents, with ARN proof of debit where ITC refund is claimed. Jurisdictional officers must record entries in refund registers, issue acknowledgements within 15 days, consider provisional refunds within seven days, and issue final orders within sixty days, with rejected amounts re credited to the electronic credit ledger by FORM GST PMT-03.