I did some research. Apparently Baycorp send the same anonymous letter to every person with that name from their data base in the hope that the offending borrower phones them back. Baycorp request the date of birth of each person that responds to check against the DOB of the debtor. Meanwhile Baycorp are harvesting information from each respondent. There are many other groups of similar names contacted as well. Quite sneaky, very dumb and seemingly in contravention of the Privacy Act?