Told I need a Default Clearance document, but not in default of any loan?

About 20 years ago ( literally ) , I attended a college for 1.5 years before transferring to another school and graduate. During the transfer , the guardians physically traveled to the esc . , Spoke w / Support dept . and they said that nothing should be . He married , bought houses , cars - there were no breaches . Then the SCH . decides to start sending notices of a debt .... ? ? ? ? ? My guards are over. I have no evidence of settlements / receipts . This sch . contacted me each w 4-5 yrs / this and other students said they had been abused as well . From your first contact w / me , so I have sent two letters drop dead . I have not heard from them for at least four years . Now , I'm taking my last undergraduate classes 4of4 necessary to enter a MAT program , and I receive this alert Help Off . I need a letter of authorization by default. This did not seem to last year when I applied .. ? As bacc postdoctoral however fin.aid unavailable. I applied this year . order to comply with the requirements for study work consideration . I called the 800 number to see if it appeared in the record for outstanding NPLs govt and said NO ( as I expected . ) What should I do ? ! ! ! Need work study now , but probably will fin.aid for masters program 2010-2011! HELP !