Thanks to the new “Digestate Decree” in force in Italy from 18 April 2016, the digestate produced from agro-zootechnical or agro-industrial biomass is considered to be a sub-product rather than waste. At long last, this measure aligns the rules at national level, overcoming regional differences. What types of biomasses are allowed? What should the producer do? What questions remain unanswered? Lorella Rossi from C.R.P.A. addresses the principal questions on this topic.