How to Label AI Images, Video, Audio, and Text: The Practical Compliance Guide for EU AI Act Article 50

Under Article 50 of Regulation (EU) 2024/1689 (the EU AI Act), labeling AI-generated media is not a generic recommendation—it is a strict statutory requirement. However, the law does not prescribe a single monolithic watermark. Instead, it establishes performance criteria: disclosures must be clear, distinguishable, accessible, and presented at the earliest point of exposure.

For creative directors, marketing leads, video producers, and software developers, the key challenge is achieving flawless regulatory compliance without compromising creative design. Below is the practical, per-modality implementation manual.

The Legal Baseline: Article 50(5) Salience & Accessibility

Before choosing a label format, every publisher must satisfy the core criteria set forth in Article 50(5) and Recital 137:

• Timeliness: The disclosure must be presented at the latest at the time of first interaction or exposure. Hiding a disclaimer in a distant website footer or buried terms page violates this requirement.
• Clarity & Distinguishability: The notice must be immediately noticeable to an ordinary consumer without requiring forensic inspection.
• Accessibility (WCAG 2.2 AA / EN 301 549): Visible badges must maintain a minimum contrast ratio of at least 4.5:1 against the background and render text at legible sizes (never below 12px on target viewports).
• Audience Language: The disclosure must be in the language of the target market across the 27 EU Member States.

1. How to Label AI Images & Marketing Visuals

For synthetic images, digital illustrations, and AI-modified product photographs, deployers have four primary visible label placement options depending on the publication channel:

✦AI-generated · Art. 50 EU AI Act

• Corner Pill Badge (Recommended for Social Media & Ads): A semi-transparent dark or light pill placed in the bottom-right or top-left corner. It provides high salience while keeping the focal subject unobstructed.
• Caption Strip (Recommended for E-Commerce & Editorial): Placing the disclosure directly below the artwork in an HTML
• Full-Width Header or Footer Bar: A slim top or bottom strip across the asset, ideal for billboard ads and banner promotions.
• Perimeter Frame / Border: A subtle 2px border around the asset containing micro-text, suitable for digital art galleries and portfolios.

2. How to Label AI Video & Deepfakes

Video content—especially synthetic avatars, face swaps, and AI video generators (Sora, RunWay, Kling)—is governed by Article 50(4). Under Recital 134, video deployers have several flexible implementation pathways:

1. Opening Disclosure Card (First 2–3 Seconds): A clean title screen before the video begins stating: 'The following video contains artificially generated media'. This is the cleanest solution for long-form video, documentaries, and corporate presentations.
2. Persistent Unobtrusive Corner Badge: A static or pulsing badge overlay positioned in a corner for the entire duration of the clip. Best suited for short-form social videos (Reels, TikTok, YouTube Shorts).
3. Animated Lower-Third Cue: A broadcast-style banner that animates in during the first 5 seconds of playback and then gracefully fades out.
4. Mandatory Subtitle / Captions Track: Regardless of the visual option chosen, always embed a WebVTT or closed-caption track with the disclosure tag to ensure compliance with European Accessibility standards.

3. How to Disclose Synthetic Audio & Voice Clones

Synthetic audio cannot be labeled with visual pixels alone. For AI voice clones (e.g., ElevenLabs), automated customer bots, synthetic podcasts, and radio broadcasts, deployers must provide an audible spoken notice:

Best practices for audio disclosures include: • Spoken Preamble: Place a 2–3 second spoken announcement at the beginning of the track. • Spoken Outro: In conversational customer service bots, confirm the AI nature at the beginning and end of the session. • Player Embed Badge: If the audio is hosted on a web player, include an interactive AI badge on the UI player container.

4. How to Disclose AI Text & Online Publications

Under Article 50(4) paragraph 2, text published with the purpose of informing the public on matters of public interest must disclose its artificial generation. For blogs, news outlets, and corporate websites, use the following standards:

• Byline Chip: Positioned immediately beneath the article headline (e.g., 'By Editorial Team · AI-Assisted').
• Article Disclaimer Box: A callout at the beginning or end of the article detailing how AI was utilized.
• Machine-Readable JSON-LD Metadata: Embed structured schema.org markup in your website's HTML tag:

<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "Article",
  "headline": "Renewable Energy Transition in 2026",
  "description": "Analysis of European grid modernization and clean power targets.",
  "creativeWorkStatus": "AI-Assisted",
  "producer": {
    "@type": "Organization",
    "name": "Acme Publishing Corp"
  }
}
</script>

5. The 24 Official EU Languages Standard

One of the most common pitfalls for international businesses is using English-only labels (e.g., 'AI Generated') when publishing campaigns in non-English speaking EU countries. European national market surveillance authorities expect disclosures in the local official language of the target market:

• German (DE): 'Künstlich erzeugt' (Synthetic) / 'KI-generiert' (General AI)
• French (FR): 'Généré par IA' / 'Contenu synthétique'
• Spanish (ES): 'Generado por IA' / 'Contenido generado artificialmente'
• Italian (IT): 'Generato da IA' / 'Contenuto generato artificialmente'
• Dutch (NL): 'AI-gegenereerd' / 'Kunstmatig gegenereerd'
• Polish (PL): 'Wygenerowane przez AI' / 'Treść wygenerowana sztucznie'
• Portuguese (PT): 'Gerado por IA' / 'Conteúdo gerado artificialmente'