Home > Request a Discovery Green family membership.Request a Discovery Green family membership.Sign up for your Discovery Green membership. Please complete the short form below to request your FREE Discovery Green family membership. There’s a limited quantity of memberships, so they will be given on a first come, first served basis—don’t delay! Note: Membership confirmation and information will be sent via email. All fields are required.Name* First Last Green Mountain Energy account number*Phone*Email* Enter email Confirm email