1 How to Pay Your Conveyancing Stamp Duties Via FAST (DBS & POSB Only) In order to pay your stamp duties via FAST, you must fulfil the following conditions: 1) Payment can only be made via a DBS/POSB personal account (i.e. non-corporate account). 2) Payment is for conveyancing stamp duties (i.e. Buyer’s Stamp Duty, Additional Buyer’s Stamp Duty and Seller’s Stamp Duty). 3) The total amount of stamp duties payable must not exceed $200,000. STEP 1 1) Login to the e-Stamping Portal 2) Go to Payments & Transactions Search Transactions