They will each need to use the fundraiser’s upper level referral url for the register page.
The Register page for an affiliate url will look like this:
For example, if your fundraiser has 3 levels:
Administrator (Top Level) > Teachers > Students
you will use the Teacher’s referral url to register each student.
You can find your URL and generate links in your Fundraiser Portal.
The url format will be: maddashmixesfundraiser.com/page/ref/username