by the United States government, United States Code — Title 11, Chapter 5…
“ A creditor or an indenture trustee may file a proof of claim. An equity security holder may file a proof of interest. (b) If a creditor does not timely file a proof of such creditor’s claim, an entity that is liable to such creditor with the debtor, or that has secured such creditor, may file a proof of such claim. (c) If a creditor does not timely file a proof of such creditor’s claim, the debtor or the trustee may file a proof of such claim. ”
