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A pan-European automated clearing house (PE-ACH) is an clearing house that is able to settle SEPA compliant credit transfers and direct debits across the Eurozone.
At present there is only one PE-ACH in operation - STEP2 - which was established by the Euro Banking Association in April 2003. According to a survey done by Equens, in the future one PE-ACH might be less relevant as banks will settle their transactions via multiple clearing houses rather than using one central clearing house.
Source of the article : Wikipedia