The $20 September 11th SilverLeaf Coin-Certificate from Liberia is a unique piece of paper money that holds historical significance. Issued in 2001, this legal tender features a certification number of CE6488 and is a valuable addition to any coin or paper money collection. The coin-certificate showcases a design commemorating the September 11th terrorist attacks, making it a meaningful and sought-after item for collectors and history enthusiasts alike.