The Day-ahead market is a wholesale electricity auction. Participants buy and sell energy for delivery the next calendar day. In Europe, CACM regulations and the EUPHEMIA algorithm (run by NEMOs) set hourly clearing prices across bidding zones by 12:00 CET.

The physical energy trade happens on this market, but the environmental attributes don't come with it. It's a seperate market altogether. Those are tracked separately through Energy Attribute Certificates. A company doing Scope 2 reporting would buy Guarantees of Origin (GOs) independently to cover their actual consumption. To claim that energy as renewable, the GOs then get cancelled through national registries or through Soldera Virtual Accounts.