no need to refund 'unutilized' sinking fund.

further, trying to identify the quantum of unutilized sinking fund for one parcel of unit within a strata development is a whole level of challenge right there.

After gathering much info, here is the conclusion.
Selller's lawyer writes to the JMB/MC and request for the amount of unutilized sinking fund. However, this has nothing to do with refund by JMB or buyer.
However, seller's lawyer could add the unutilized sinking fund into the payment of apportionment table, asking for a refund. There is nothing wrong with that, however buyer has no obligation to pay the amount. It just takes a simple letter from buyer's lawyer to revoke the undertaking as there is no provision in the S&P or housing development act & Regulations for the refund of outgoings incurred by the seller. Instead, there is a clear clause on seller's obligation to pay his or her own outgoings in full prior to posession by buyer, while the buyer takes over the obligation starting on the date of possesion or earlier depending on their agreements.

Hope this helps for buyers of subsale property.

Mostly, for ordinary people when mentioning the sinking fund, they are referring to the sinking fund that paid together with maintenance fee to the JMB/MC, which is normally won't be refundable by JMB/MC.

Yes, it is pretty common those assessment fee, quit rent, insurance being apportion to be paid by the buyer, as those considered being paid "advance".

Miss read your previous post about the outgoing issue on sinking fund.

Ya, the outgoing which included sinking fund (except those being paid in advanced) can be subjected to contention.
As sinking fund generally is paid monthly together with maintenance fee.
We know unutilised maintenance fee paid (or surplus in management account of JMB/MC) generally is not considered outgoing item.

So it is down to mutual agreement, and better list out one by one, instead just put the word "outgoing".