Meanings
idiomaticper procurationem, per pro, p.p.; indicates that a signatory is not of themselves qualified to sign, but has been instructed or authorized to do so by someone responsible. Unlike English usage, the latter’s name is usually not indicated.
Im Auftrag, Weber, Oberstudienrat.
Used other than figuratively or idiomatically: see im, Auftrag: by instruction, order (in other contexts)