I was on the phone to the CSA today and found out that my ex is now about £1,000 in arrears for child maintenance. This has accrued over three years, the majority of which she's been unemployed(!) She's managed it by never, ever telling the CSA about the brief periods of employment she's had and so by the time the CSA finds out, she's stopped working again and is back on benefits.
So, I'm opening the bidding at £1,000. Can anyone beat that?