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🗺️ Perdura IP Litigation Series

Cross-Border Evidence Admissibility

A Checklist for Multi-Jurisdiction IP Proceedings

Collect once to the highest standard. Certify for each jurisdiction.

  • Collect to the universal authentication floor — SHA-256 + RFC 3161 + log
  • Add jurisdiction-specific certifications — PD 57AC, notarisation, JIPDEC
  • Identify and address blocking statute risks — France, Germany, China
  • Manage GDPR and personal data — SCCs before cross-border transfer
  • Plan for Hague Convention and MLAT requests — begin at outset of litigation
  • Prepare a cross-border evidence plan — rights, requirements, and coordinator mapped
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Major IP jurisdictions
US, EU/UPC, UK, Germany, China, Singapore, and Japan — the seven jurisdictions where most high-value IP disputes are litigated. One collection methodology works across all seven.
eIDAS
Universal timestamp standard
RFC 3161 timestamps from an eIDAS-accredited QTSP are recognised or accepted in all seven major IP jurisdictions — the closest thing to a universal authentication instrument available.
Art. 41
EU legal presumption
eIDAS Article 41 creates a legal presumption of timestamp accuracy in EU proceedings. The challenger bears the burden of proving a specific defect — the default position favours the timestamp.
Key Principle
A SHA-256-hashed, RFC 3161 eIDAS-qualified-timestamped digital capture with a documented collection log satisfies the core authentication requirement in every major IP jurisdiction. Collect once. Certify for each forum.
What's Inside

7 steps for multi-jurisdiction evidence.

I Collect to the Universal Authentication Floor — SHA-256 + RFC 3161 + log
II Add Jurisdiction-Specific Certifications — PD 57AC, notarisation, JIPDEC
III Identify and Address Blocking Statute Risks — France, Germany, China
IV Manage GDPR and Personal Data — SCCs before cross-border transfer
V Ensure Consistency Across All Jurisdictions — single master repository
VI Plan for Hague Convention and MLAT Requests — begin at outset of litigation
VII Prepare a Cross-Border Evidence Plan — map rights, requirements, coordinator