Patent ID: 7717413

Claim:
A method for controlling a paper-handling unit generating groups of items, wherein each group includes a plurality of items, comprising: (a) determining whether a predetermined event has occurred; (b) if the predetermined event has occurred, removing a group from the paper-handling process, wherein the paper-handling unit continues to generate groups after step (a); (c) determining whether predetermined features were detected from the items of the removed group during a predetermined interval after removing the group so that the start of a required validation process may be determined; (d) if no features were detected during the predetermined interval which indicates that the required validation process of the removed group was not started, stopping the paper-handling unit; (e) if features were detected during the predetermined interval which indicates that the required validation process of the removed group was started, determining whether the removed group meets at least one predetermined criterion based on the detected features; and (f) if the group does not meet the at least one predetermined criterion, stopping the paper-handling unit.