It's been five years since the end of the Irish punt, but 300 million have yet to be exchanged for euros.

Tomorrow is the fifth anniversary of the euro's full introduction as Ireland's currency.

Over three and a half billion punt notes and coins have been shredded into briquettes or melted down.

More than 200 people a week are still calling to the Central Bank to exchange their money. Bank tellers have heard stories about piles of punts discovered in old mattresses or christmas stockings stocked away in the attic.

Some punts will never return, kept as keepsakes by tourists or locals. But there's no time limit on changing old Irish money, so check those old mattresses and head down to the Central Bank.