Dispute Resolution analysis: The Court of Appeal decided that a significant penalty had to be applied to a solicitor who had signed off a bill of costs which breached the indemnity principle. It was irrelevant that she had entrusted the task of drawing the bill to an outsider, a costs draftsman, whom she blamed for getting it wrong. As a simple matter of agency law the solicitor was answerable for acts done by her representative. Accordingly, 50% of the correct bill was to be disallowed under CPR 44.11 which empowers the court to penalise unreasonable or improper conduct. Analysis by Professor Dominic Regan, City Law School, London, special advisor to the Association of Costs Lawyers.