 The $50 000 denomination was the first denomination to use the Optically Variable Ink technique, on the value positioned at the top right of the obverse.The $750 000 denomination of the December 2007 series was the only note out of all cheques of the second dollar to bear a holographic strip, as the cheque was printed on paper that was prepared for the 1 000 ZWD notes (Pick No.12).