If you are trying to locate your debenture certificate, it looks like the specimen depicted below.    Debenture certificates were issued to 90% of debenture holders.  (Approximately 10% were issued in book entry form for which no certificate was issued to the holder.  Issuing debentures in book entry form began in 1998.  These include some of the last debentures sold as well as recent transfers.)     Debenture certificates were printed on banknote paper, 122 inches by 92 inches. All certificates are Series AA.@