There are 2 ways to earn Cashback:

Online:

Shop in over 2500 stores, including eBay, Marks & Spencer and Play.com, each offering exclusive discounts and cashback on every purchase you make. Once you hit £25 in your personal cashback account, you get paid! Click the button to register, you will be forwarded to the Gift cashback shopping portal, fill in your details and choose your students' union logo and you are then ready to start earning cashback for you and your students' union everytime you shop! 
Online Cashback

In Store:

As well as shopping online, we also have 8 ‘in-store’ retailers offering cashback, including Blockbuster, Sports Direct, Dorothy Perkins and Cineworld. Just register your credit/debit card and every time you use it in one of the 8 stores, cashback is added to your account. Click the button to register your debit card.
In Store Cashback