Millions of Germans are still unable to use their bank cards because of a software bug that struck at the start of the year.
A programming mistake prevents many ATMs and shop machines from recognising the year 2010.
The problem is affecting around half of the 50 million cards in circulation.
Christian Achilles of the German banking association, DSGV is nonetheless advising people to try using their cards as many do still work properly. If the problem persists though, he adds, customers should go and withdraw money from bank cashiers.
The world’s biggest chip card maker, Gemalto, has said it is investigating the situation and is looking for a solution that will not involve having to get all affected cards replaced.
According to the banks, the issue should be resolved by Monday.