For those of you who are concerned that you are just going to get an invoice from PERS, guess what: "you are correct." PERS does *not* intend to justify the amount invoiced this time through. They assert that you were invoiced once in either 2006 or 2007 and you had 60 days to appeal or contest the amount. Thus, they are not required to either document how they arrived at the amount you owe, or give you any further appeal rights.
While all of this may be true, it seems bad policy to send an invoice with no explanation for how PERS came to the amount you owe,and claim they notified you 6 (or 5 or 7) years ago of the amount and that you have no right now to ask for an explanation or be able to challenge the amount.
There are many people genuinely concerned about this matter. They may have been invoiced back in the day, but many are under the impression that when the invoices were enjoined from being collected, they were effectively nullified. Again, the policy is clear, but the implementation seems a bit heavy handed to me. Since they have copies of the 2006 or 2007 letter, it would add little to the collection costs to include them again to remind people how they came to the amounts. This would probably save more money in the long run than cost in the extra postage and printing. Penny wise, pound foolish. Also, a chance for more lawyers to get involved. PERS cannot prove they actually sent the invoices since they weren't sent certified or registered. People can easily claim they didn't get them. Ugly and foolish if you ask me.