When I sign up for an offer, do I have to use the same email address as I have registered at imutual?
Generally, no. By using the imutual links to visit our partner sites, the tracking of your cashback will be done automatically using cookies. If the partner site asks you for an email address, you can use any valid address - it doesn't have to be the same as the one you entered when registering as an imutual member.
There are a small number of cashback offers where you do have to use your imutual-registered address; this requirement will be stated in the description of the offer on www.imutual.co.uk