The projects selected under the call “ZEROPOLLUTION-01-07 include: STAR4BBS (Sustainability Transition Assessment Rules for Bio-Based Systems), HARMONITOR (Harmonisation and monitoring platform for certification schemes and labels to advance the sustainability of bio-based systems), and SUSTCERT4BIOBASED (Sustainability Certification for Biobased Systems). These three projects have formed a project cluster named BIOBASEDCERT. This report aims to highlight the added value and purpose of the cluster; summarise different clustering activities among the aforementioned three projects implemented during the first eighteen months; and, provide an overview and explanation of upcoming joint activities.