Because all residents of a community may not be automatically eligible for the opt out aggregation program because they have already contracted with an alternative generation supplier, those residents would not receive an opt-out letter. Instead, those residents may receive an “opt-in” letter, also known as an endorsement letter, which lets the resident know that the City is beginning an aggregation program and they have the ability to join during this period of time. All such notices include the disclaimer that the resident should contact their current alternative supplier to determine the terms and conditions, and if they would incur an early termination fee for switching to a new supplier.