Selling a car without RWC what are my obligations?

[Winnie]

Why would you want to do that... that is a HUGE risk to you and none to him
Just do it the way Cuppa and Vic Roads suggest, hand in the plates and sell it unregistered.
Selling on the presumption that he will get RWC, complete the transfer etc is fraught with danger.
The car is still registered to you if something goes pear shaped

I sold a car with no RWC and it still had registration. The buyer filled out and signed the transfer forms. He said he would get it transferred asap and I didn't think about it again.
The next year I got the registration renewal in the mail. Took the transfer forms in and straight away they put it in his name and sent him the bill for the rego. They gave him something like 14 days to come up with a RWC too.