In Self Serve, one can change the billing address. It would be great if that could be changed for a later date (like a postdated cheque, if you like). An "effective by" field would be very welcome. This way, the customer could file the address change in advance of the actual moving date. Around the actual moving date, people are usually very very busy, and then they might forget about the address change, which could result in various problems. The CRA, provincial governments and some banks have that "effective by" option implemented.