 There were additional security features as opposed to previous issues, which included security threads, see-through register marks and recognition marks for the partially sighted.Holographic security threads and Optically Variable Ink were used on the $100, $500 and $1 000 notes.When the redenomination of 1 August 2008 occurred these notes were put into circulation as banknotes of the third dollar between 1 August 2008 to 31 December 2008.