In matters of contractual arbitration (arbitrato irrituale) governed by article 412-quater of the Code of Civil Procedure, the award is not challengeable through ordinary forms and procedures but only in a single instance before the court acting as labour judge, whose judgment is subject to cassation appeal, with the consequence that objections relating to the judgment annulling the award cannot be raised in separate proceedings on the merits.
In contractual arbitration (arbitrato irrituale), where the court hearing the challenge to the award merely annuls it without ruling on the merits upon express request of the interested party, such determination precludes the subsequent re-filing of the same claim before the ordinary court.