In Mansion Estates Ltd -v- Hayre & Co (A Firm)  EWHC 96 (Ch) His Honour Judge Saffman commented:
“in my view it would be wrong to assume that it is inherently more improbable that a professional person will be dishonest than anyone else. If ever such a view validly had traction, I do not think it can do so in the modern world.”
Although not a decision relating to costs, this must have equal applicability to the signature of accuracy to a bill of costs. There may once have been a stage when “the Court can (and should unless there is evidence to the contrary) assume that his signature to the bill of costs shows that the indemnity principle has not been offended” (Bailey v IBC Vehicles Ltd  EWCA Civ 566) but the world has now moved on from such innocent days.