The photographer has acknowledged a/his 'debt' to Andy Warhol. [=the photographer has said that his work was influenced by the photographs made by Andy Warhol]
banks with millions of dollars of 'bad debt' [=banks that have loaned millions of dollars that will not be repaid]
She's finally paid off her mortgage 'debt'. [=the money that she owed the bank to pay for her house]
(..) the headquarters of these credit card companies and the TRW building. Why these buildings? Why credit card companies? If you erase the debt record, then we all go back to zero. You'll create total chaos. Keep him talking. I need to make a phone call. I really admire what you're doing. (..)1999 Fight Club