Low tariff

Got a message the other day that I had received a message on the internetbank. Since I thought it was just some commercial ad I didn't bother. Until today. Turned out it was a message from the electricity company that they owe me 15 francs! How nice to not get a bill, but money back. Ok, so they're not gonna send me cash but deduct it from the next bill. Fine with me. Excellent to know that my new and cheapo approach to using washing machine and dishwasher solely after 11.00 at night or on Sundays have an effect. Thanks neighbour who informed me!