Many webhosting companies now provide affiliates with the ability to manage accounts for multiple clients from a single login. Such a feature would greatly improve the ability of development partners and other affiliates to assist their clients without the need to maintain a large collection of usernames and passwords. Furthermore, such an interface could simply the process of affiliates and partners assisting clients with preparing orders.
Some companies have web portals that allow users to switch between accounts that have their email on them. This would also be an effective was to implement this request.