When would you mark a .VN ownership transfer as completed?

[NiceNIC]

For providers, the tricky part of some ccTLD transfers is deciding which event should close the order.

With .VN, registrar approval is followed by tax formalities, buyer re-registration and the final ownership update.

Would your system mark the transfer completed after registrar approval, after re-registration, or only after the WHOIS change?

Source:
https://vnnic.vn/vi/ten-mien-vn/dan...ien/quy-trinh-chuyen-nhuong-quyen-su-dung-ten