Creating a Supporter page on someone else's behalf is simply a case of using the other person's contact information when opening the account, instead of your own.
This will ensure that any notification emails are sent directly to them. It will also ensure that theirs is the name that is represented on any fundraising leader boards. To find out how to create a Supporter page, click here.
If you are setting up a Supporter page on behalf of someone who isn't going to have time to check and respond to emails e.g. your CEO or someone undergoing medical treatment, you can enter your own email address.