So for furture reference:
When you get an Involuntary downgrade on a business flight booked with points. You do not have to send your boarding pass to them.
I has a customer service employee tell me that and i told her that she was wrong, the passenger flight details (or manifest) will have the seat i was assigned and she said to me "I cant see that information and we need you to provide proof in the form of your boarding pass".
I politely told her that the person in the club told me i would get my points back and did not give me any conditions on that.
Then a strange thing happend, she lied to me and said "I am looking at your flight and i can see you flew the two legs on your return business, as far as we are concerned you were in a business class seat".
How do you argue with that, i told her i want my points returned without me having to waste any more time on this matter. Anyway, we ended the call and she was suppose to ring me today with a further update on another matter - guess what she didn't ring.
So i rang them solving the other matter with a guy who knew what he was doing. Then the call dropped out and he rang me back, he confirmed that i don't need to supply the boarding pass they have all the information even if it's archived, they still have it. The call dropped out again, they had system issues and were losing calls apprently.
I rang back and spoke to another lady bringing her up to speed, she said "let me have a look and said the flight information would have already been archived" (there's that word again), and asked me to wait. She came back and said "I've got all the information". I asked her "You can see the downgrade on part of my return leg?", she said "yes we can see everything, downgrades, failed to show or board....everything" She also couldnt understand why the other person told me i needed my boarding pass. Then she calculated the points and gave me a reference number stating the points would be back to my account within 7 days.
I have had a number of reasons to call qantas over the past year and each time i have been initially stuffed around and eventuallly i get an employee that knows what they are doing.
Anyway - i hope the information helps others.