The POTENTIAL (Pan-European Open Test Network for eIDAS Integration in National eID Wallets) Large-Scale Pilot brings together over 140 partners from 19 EU Member States + Ukraine.
It tests the European Digital Identity Wallet (EUDI Wallet) across six use cases — eGovernment services, bank-account opening, SIM/eSIM registration, mobile driving licence (mDL), qualified e-signature (QES), and ePrescription — demonstrating secure, cross-border interoperability for trusted digital identity.

This page summarises how POTENTIAL addresses the four interoperability dimensions of our framework.

Organisational Interoperability

• Establishes a multi-national consortium (19 MS + Ukraine) including governments, banks, telecoms, and health authorities under a shared governance model.
  → https://www.digital-identity-wallet.eu/

• Defines six use cases that serve as testbeds for sector-specific collaboration: eGovernment, Banking, Telecom, mDL, QES, Health.
  → https://www.digital-identity-wallet.eu/6-use-cases/

• Coordinates on-boarding of national wallet providers through a common test network (“Playground”) used for interoperability and conformance validation.
  → Press Release – 3rd Building Block (June 2025, PDF)

Legal Interoperability

• Addresses sector-specific regulations — PSD3/PSR (banking), GDPR (data protection), and eHealth Regulation (for ePrescription).
  → Press Release – 3rd Building Block (June 2025, PDF)

Semantic Interoperability

• Defines a core attribute set for each use case — for instance, identity data for eGovernment, financial identifiers for banking, and prescription identifiers for health.
  → https://www.digital-identity-wallet.eu/6-use-cases/
• Describes a shared architecture and reference implementation that ensures harmonised attribute handling across participating Member States.
  → Press Release – 3rd Building Block (June 2025, PDF)

• Uses a common toolbox developed under the EUDI Wallet Initiative to maintain alignment with other pilots. (This derives from the EUDI Wallet Toolbox and Architecture & Reference Framework, which apply to all LSPs, but POTENTIAL’s public materials refer only to a “shared toolbox” rather than naming ARF explicitly)

Technical Interoperability

• Deploys a Pan-European test environment (“Playground”) that allows national wallet implementations and service providers to perform cross-border interoperability tests.
  → Press Release – 3rd Building Block (June 2025, PDF)
• Provides common endpoints and a shared reference implementation to support validation of interoperability between different national wallets.
  → Press Release – 3rd Building Block (June 2025, PDF)
• Facilitates coordination of testing activities with the other LSPs (EWC, DC4EU, NOBID) to ensure consistency of approaches and toolbox evolution.
  → Press Release – 3rd Building Block (June 2025, PDF)

Summary

POTENTIAL interprets interoperability primarily through its governance and testing approach, ensuring that national wallet implementations can interact consistently across borders.
Its public materials emphasise three main elements:

1. Collaborative organisation: a large multi-national consortium (19 Member States + Ukraine) coordinating six sector-specific use cases.

2. Legal alignment: application of eIDAS 2.0 principles within national contexts, with sectoral attention to data protection, banking, and health regulations.

3. Operational testing: deployment of a shared Pan-European “Playground” where Member States test interoperability between their wallet and service implementations.

While the press releases and website do not explicitly reference the Architecture & Reference Framework (ARF) or specific protocol names, the initiative operates within the common EUDI Wallet Toolbox that all Large-Scale Pilots use as their baseline.