Perhaps the service provider is concerned that it could become too easy to change the address?
Fraudulent address changes are often followed by unauthorized transfers and other theft from accounts. Making address changes easy could make it easier to rip customers off.
If you ever get the ability to have customers input a change of address via your online banking portal, make sure you have a robust control procedure to mitigate the risk of fraud.
_________________________
John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8