Purpose: The purpose of this study is to explore if and how informal governance mechanisms are used for coordinating actors of digitalized supply networks. Design/methodology/approach: A multiple case study analysis of ten German firms in digitalized supply networks is conducted. Data are collected through semi-structured expert interviews with interviewees having notable years of professional experience in purchasing or sales. Findings: This research shows that reduced personal contacts in digitalized supply networks decrease the ability to coordinate with informal governance mechanisms. However, the need for informal governance in digitalized supply networks remains when facing supply network disruptions or building new business relationships. Originality/value: This is the first study examining the role of informal governance mechanisms in digitalized supply networks. Theoretical and practical insights on the changing abilities and needs to use informal governance after the digital transformation are given.