If you cannot fly, you can redeem for a nominee (relative or friend).
Remember with SQ that you can redeem through them on any Star Alliance partner.
As the OP is from Melbourne, MEL_SIN in J would be too expensive. 1110 K fom MEL return and 65K from PER return.
If they wish to fly from MEL then it would be an option to fly redeem via SQ on Air New Zealand to NZ or Pacific destinations.
If booked as a return they can stop-over in NZ as well. = 35K.
For online bookings that comes down to 93.5k (mel) or 55,250(per) for return / half that for one way (46.8k, 27.7k). If not used to travelling in J it could be a nice treat to redeem in J and do other direction on best fare on another carrier. In Y return is only 42,500. Also note these tickets allow travel to anywhere in SE Asia or South China (eg HKG) via SIN.
Join Australian Frequent Flyer (AFF) for free and unlock insider tips, exclusive deals, and global meetups with 65,000+ frequent flyers.AFF members can also access our Frequent Flyer Training courses, and upgrade to Fast-track your way to expert traveller status and unlock even more exclusive discounts!