Replacement: → (*AA0000000) : Banknotes that have been issued to replace banknotes that have been damaged or destroyed before being put into circulation. The symbol "✽" precedes the serial number on replacement notes with a 2-letter prefix. → (AAX0000000) : Banknotes that have been issued to replace banknotes that were damaged or destroyed before they were put into circulation. The letter "X" is added as the third letter on banknotes with a 3-letter prefix.