Abstract: A method and apparatus for vertically scoring a tamper-indicating plastic closure includes a rotatably-driven carousel which includes mandrel assemblies at the periphery thereof. Each mandrel assembly includes a rotatable mandrel on which a respective closure is positioned in operative association, so that the mandrel and closure are moved relative to an associated scoring mechanism. The scoring mechanism includes at least one, and preferably a plurality, of rotatably driven scoring blades, with each blade arranged to engage and cut the pilfer band of a respective closure. Significantly, the system can be operated so as to closely approximate the preferred radial movement of the blade with respect to the closure, thus minimizing "digging" of the scoring blade into the plastic of the closure.