If payment has been made for both stamping submissions, please proceed to request for refund for the duplicate record via the Stamp Duty Portal under "Request" > "Apply for Refund".

However, if payment has not been made for the duplicate record, please submit a request to invalidate the record via the Stamp Duty Portal as follows: "Request" > "Apply for Assessment/Appeal" > select "Assessment". Enter the Document Reference No. to retrieve the stamping record.