Kwiecinski added that the Polish banking sector was prepared for the decision of the EU's top court.

The European Union's (EU) top court ruled on Thursday in favor of Polish consumers who took out mortgages in Swiss Francs, allowing them to ask Polish courts to convert their loans into the local currency.

(Reporting by Marcin Goclowski and Pawel Florkiewicz, writing by Alan Charlish; Editing by Jon Boyle)