GST Payment Advice issues bank instruction to transfer sanctioned refund to the taxpayer's nominated account. Form GST RFD-08 is a payment advice template issued under a Refund Sanction Order to instruct a bank to credit the sanctioned refund amount to the taxpayer's nominated account. It records the refund amount, date, place, and full bank account particulars (account number, bank name and branch, account type, account holder, IFSC, MICR) and provides fields for IGST, CGST and SGST allocation. An authorised official must sign digitally and include name, designation and office address to validate the instruction.