I got told I owed them $4900, was given the so called evidence and it took me nearly 3 months to get the evidence to show them that I only owed them $ 1000. The whole process is so flawed and the people that you talk to know of this. The problem was I've also had a few other debts in the past which I cannot check now because employers don't hold payslips after 7 yrs... I've probably paid centrelink back money I don't actually owe them.
I think it's appalling that a government department can get away with this when they know it doesn't work and has flaws.