An application component that maintains the registry of authorised relying parties (healthcare providers, pharmacies, hospitals, cross-border services) that are permitted to request and receive health credentials from patients' EUDI Wallets within the myHealth@myHands ecosystem. Each member state maintains its own national Relying Party Trust Registry, and registries are federated across member states via the Trust Registry Federation mechanism. Relying parties must be registered before they can request credential presentation.