Abstract: The disclosure relates to a verification system of the type which affords authorized persons access to check cashing facilities, private buildings, or the like. The verification system comprises a plurality of sets of switches, each set including a plurality of switches comprising a first group of switches and a second group of switches, coupling means coupling the first group of switches for each but one set of switches to all of the switches of the next succeeding set for serially coupling the sets of switches, indicating means coupled to the first group of switches of the one set and disabling means coupled to the second group of switches of each set for disabling the system responsive to any one of the second group of switches. As a result, when one of the first group of switches of each set is closed, the indicating means provides a verification indication and when any one of the second group of switches is closed, the disabling means disables the system indicating non-verification.