Do I need to return the deceased's CPF monies to CPF if he had used it to pay off his property?
From CPFB website:
Waiver of CPF used for property
There’s no need to refund the CPF savings that the deceased had used to buy a property. The property won’t be covered by CPF nomination and will be part of the estate.
The deceased’s share in a property with a joint tenancy automatically passes to the remaining owner(s).
If there’s a tenancy-in-common or property was solely owned, the deceased's share will be inherited under their will if they had written one. Otherwise, intestacy laws will apply.