Article 21
Refusal of enforcement 1. Enforcement shall, upon application by the debtor, be refused by the competent court in the Member State of enforcement if the judgment certified as a European Enforcement Order is irreconcilable with an earlier judgment given in any Member State or in a third country, provided that: (a) the earlier judgment involved the same cause of action and was between the same parties; and (b) the earlier judgment was given in the Member State of enforcement or fulfils the conditions necessary for its recognition in the Member State of enforcement; and (c) the irreconcilability was not and could not have been raised as an objection in the court proceedings in the Member State of origin. 2. Under no circumstances may the judgment or its certification as a European Enforcement Order be reviewed as to their substance in the Member State of enforcement.