A lifting device equipped with an RFID scanning system having an article
receiving area configured for receipt of a stack of articles having RFID
tags associated therewith. A first scanning antenna is provided at a
first height relative to the article receiving area, and a second
scanning antenna is provided at a second height relative to the article
receiving area that is above the first height. A computer control system
is in communication with the first and second scanning antennas and
applies a verification parameter to RFID signals received by the second
scanning antenna to determine whether RFID tagged articles detected by
the second scanning antenna are within the stack of articles carried by
the lifting device.