Front end controllers are inadmissible in a retail environment and the FEC is placed strategically at the front end to ensure that merchandise does not leave unaccounted and with the applicable documentation. Front end is known to have under/over ringing by cashiers, collusion between customers and staff. Front End Controllers should always act as a frontline barrier against unscrupulous cashiers and corrupt customers in the identification of collusion to reduce high shrinkage in this area.