After OTP granted, the buyer will do the valuation request and secure the financial. Within 21 days, the buyer will have to exercise and pay for “Option to Exercise Fee” upto $4,000.
Then both you and the buyer have to submit HDB resale application. It doesn’t matter who to submit first, however, the later one must submit within one week after the first one submitted. Otherwise, the application will be cancelled, and there will be no refund.
If your flat is 3-room or bigger, you have to pay $80 for the submission.