There's been a lot of actives being taken lately, raided and the items stolen off the account.
The PIN lists we have on ck are from a specific period of time in the past. Basically, if the PIN is a new one, it's not on that list.
If you have an active account/main, please go create a PIN. It takes only a little bit of time and could save your shit in the future.
I know other people have said this but with the increase in account raids following TNT taking the captchas away, I thought a reminder was in order