What was a DOFD?
If it was CO in 2002 then that CO will show until that month in 2009 on your CR
I personally would send the OC a letter of verification, this is NOT the validation letter you send the CA. At this point you want something from them the key here is to PLAY NICE, threatening them with statutes, laws and violations would come across the wrong way (IMO this late in the game), ASK NICELY what records they have. Finding the DOFD is the key here, it may be due to drop off this year sometimes according to the CO date you posted. ( I am guessing)
DO NOT send the letter you have written.
9 times out of 10, a debt that old and the OC was bought out, chances are your records are lost somewhere or on mico in someones basement and NO ONE wants to go down there and search it for hours on end and it usually gets deleted.