Synthetic-content marking evidence checklist

Article 50(2) addresses machine-readable marking and detectability for certain AI-generated or manipulated audio, image, video and text outputs. The Commission notes a limited transition to 2 December 2026 for certain systems placed on the market before 2 August 2026.

1. Inventory output types generated or materially manipulated by each AI system.
2. Identify the machine-readable mark or provenance signal generated upstream.
3. Test the user-delivered output, not just the raw model output.
4. Check whether resizing, transcoding, compression, screenshots or export remove the signal.
5. Record technical limitations and failure modes.
6. Document any standard-editing or non-substantial-change exception relied on.
7. Preserve test evidence, date, system version and accountable owner.
8. Retest after model, media pipeline or vendor changes.

Add the evidence trail to the AI Governance Control Pack

General operational guidance only. Confirm legal scope, exceptions and transition rules with qualified counsel.