If the users home institution address corresponds to {HEAD ~ the home server}, {TAIL ~ the banking machine} operates responsive to messages from the home server 
If the users home institution address corresponds to { HEAD ~ the home server } , { TAIL ~ the banking machine } operates responsive to messages from the home server
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH