These are Bank Training Notes and they are not legal tender. These notes were printed by Note Printing Australia for circulation within the Australian banking system. These notes were used to assist in the training of bank tellers. The materials used for these notes were printed on genuine silk fibre banknotes paper with special multi coloured silk threads as an anti-counterfeiting device and were printed in the same colour and size as the last Australian paper banknotes. There is a story to tell on the paper used for these notes. Back in 1964 where the then Commonwealth Bank (now Commonwealth Bank of Australia) had intended to issue a new Five Shilling banknote. When the decision was cancelled, NPA used them to print these training notes instead. These notes are not rare and in fact quite affordable.