A method is disclosed for authenticating and enabling returns at a physical store location and based off of an electronic receipt. Also disclosed is a luer seal extractor for removing the luer seal from the column tips substantially simultaneously. The sensor module includes a biometric sensor adapted to detect biometric information from a person’s body, a processor unit adapted to authenticate the person in response to the detected biometric information and generate an authentication signal representing an authentication result, and a memory adapted to store biometric information of a specific individual associated with the card. The CAS Read queue and CAS Write queue outputs are connected to a 2-to-1 multiplexer. The calls can be packet switched or circuit switched.