Filing for a declaratory judgement generally means filing a lawsuit that requests that the Court issue an order declaring the lien null and void for a certain reason.  Here for the statute of limitations reason.  It is not just a form to file.  It can be confusing and costly.  I think that you should seek consultation from an attorney.  Paying an attorney to write a really persuading letter as to the matter may be all you need.  As for the credit issue  (the matter listed on your credit reports) you can challenge the entries and the creditor has 30 days to respond.  If they do not it is supposed to be wiped from your credit report.  Get help.  Good luck.