Bench Walk Advisors is backing a claim against Dutch energy supplier Vattenfall (formerly Nuon). The claim alleges that the energy supplier systemically charged SMEs and non-profit organisations an unjustified surcharge on its energy bills. The claim seeks a refund of the overcharged costs for approximately 5,000 duped customers, which it estimates to be over €400 million plus interest. The claim is being organised by ClaimShare, an Amsterdam-based professional platform for collective legal advocacy. Dutch law firms Birkway and De Haan Advocaten & Notarissen are leading the case.