Yes, Green Mountain Energy does offer a referral program. This program allows existing customers to refer friends and family to Green Mountain Energy. When a referred person signs up for service, both the referrer and the new customer can receive rewards or credits that can be applied to their accounts. The specific details of the referral program, including the types of rewards and eligibility, may vary over time, so it is important for customers to check the most current information available on their website. This can provide insight into how the program works and any applicable terms and conditions. For anyone interested in participating in the referral program, looking on the official Green Mountain Energy web page would be a great way to find the latest details and guidelines.