DuckCorp Dico

Found one definition

1.                 From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
                   
   
   
                   
                     
   back bill /bˈak bˈɪl/
   unbezahlte Rechnung, unbeglichene Rechnung, nichtbeglichene Rechnung
      Synonym: unpaid bill
    see: bill, check, tab, bills, checks, table bill, table check