The principle non reformatio in pejus means that it can’t be created for
the appellant a worse situation that the one before the judgment under appeal besides if
he expressly consents to this one or in the cases specifically provided by law. The necessity of this rule is explained in the following way: the purpose of the civil trial is not
to find the material truth as in the case of the criminal trial, but the solution by which to
determine which of the two parties is right.
