An errata sheet is not usually part of a book. ... rectify simple errors, only in “extreme cases” where errors are “severe enough to cause misunderstanding.” The sheet is then laid in loose inside the ...

However, changing deposition testimony on an errata sheet is not without consequence. Indeed, a prime example of this occurred in Ball v. Rolling Hill Hospital , 518 A.2d 1238 (Pa. Super. 1986).