I thought it’ll be good if HDB actually announces this as part of their press release.
On the 18th of May, HDB has revised the checklist for both buyers and sellers. For practicing agents, please use these forms with immediate effect.
For the seller’s portion, you’ll have to go through the enhance resale checklist which was introduced awhile ago. The gist is that you have to definitely download it from their site so that they’ll generate a unique code for you to deposit it into their depository.
You can read more about the Seller’s enhanced resale checklist here.