Reversible error – this term applies in the sphere of Court procedures in some legal systems. There it refers to an error that occurred during the procedure, or was implemented in issued court decision. This error is so important that it entitles the involved party to appeal the court decision. For example, such reversible error occurs in situation where the defendant has not been allowed by the court to protect their own rights (for example not been informed about the scheduled hearing and therefore failed to participate). Or in situations where the court decision describes an illegal punishment, not set in the local penalty legislation.