By 31 December 2021, thanks to the bolletta web option, approximately 1.1 million Acea Group customers (as regards the companies Acea Energia, Acea Ato 2, Acea Ato 5, Gesesa, Gori and AdF) were receiving their bill in digital format, thus generating a saving of 152 tons of paper, with an increase of around 44% compared to the figure for 2020).