 An earlier reported instance of a mule involving the small-sized 20c coin introduced in 2006 with a Canadian 5c most probably relates to reports in the press of the discovery of Canadian 5c coins in mint rolls of NZ 20c coins, mainly in the Taranaki region; this was simply a packaging error and no actual muled coins are known.According to the Reserve Bank Act 1989, there are limits on the amount that constitutes legal tender