Yes.. by right once u see grant approve with amount. by next 2-3working days u can see the amount credited into yours or your spouse CPF account. then confirm can start chasing HDB for appointment on keys collection already.
I don't want to chase when i paid deposit, they told me keys will be by this year and need to produce marriage certification upon signing of agreement. I asked on appeal - they say fairly subjective.
Did more research and most couples usually did not have any problem once they give proof such as banquet invoice. But also depends on your CRM lor, especially if you take grant or not also.
Me and SO in tricky situation because we not having banquet. Doing mosque wedding and they only allow bookings to be done 3 months in advance. So I got no proof as my wedding planned to have it in February and can only book in December (which is the worse time to do anything since everyone is on leave). After I book mosque and confirm the venue then I can book others things. Better stay quiet for now