When a gift of membership is given to a constituent, you can go to the primary member's membership record to change the renewal information.
On the constituent's membership page, click Edit renewal information under Other tasks. The Edit renewal information screen appears. In the Send renewal notice to field, you can select the notice should go to the constituent who made the initial gift of membership, to the primary member, or to both constituents. In the Given by field, you can view the constituent who made the gift.