Looks like the CA is I.C. Systems Inc.    Yes, definitely try to send a PFD by mail.  Be nice because as RobertEG said a PFD is a type of GW.  To dispute something, you have to have some grounds.  You just can't dispute because it's there.  Other option of course is to pay it, then attempt a GW for it.  Hope it works out for you.  Good Luck.

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