reformatio in peius → change for the worse
A reformatio in peius (Latin: "change for the worse") occurs in law when as the result of an appeal, the appellant is put in a worse position than if there had been no appeal. For example, an appellant in a criminal case might receive a more severe sentence on appeal than in their original trial.
Reformatio in peius - Wikipediareformatio in peius -- μεταβολή επί τα χείρω