Got the car transferred into my name recently + paid next years rego. I had a healthcare card (not working, uni student, don't wanna pay any more for rego than I have too), so I paid the $162.80 which I assumed I was meant to pay (I assumed the healthcare card gave a full concession). Anyway, I get two letters back from Vicroads, one saying I'm completely paid up, the other saying I owe them $319 in outstanding fees (eg. I need to pay a FULL rego.. ~$550).
So I go to Vicroads, talk to the information lady, and before sending me to one of the girls who handle all the stuff they do at the centers, she does some calculations, and assumes that I owe $162.80 again, as I have a Healthcare card, and that entitles me to a partial concession, so I owe $325.60 all up. Then she directs me to one of the girls there, and she comes up with some random figures.. First, I owe $162.80, then I owe $202, then I owe $117, then finally she comes to the conclusion that I only ever owed $117, and I need a refund. Hoooray!
So, through VicRoads cluelessness, instead of paying $162.80 (which I'd almost say is what I should be doing), I'm receiving a refund in the mail of $45, at some point! If you ever get a letter from Vicroads complaining about anything, just go in there.. you're very likely to come out on top