The combined situation

Undress.app is one of the highest traffic nudify services. It markets itself through aggressive paid social campaigns and operates a referral program that incentivizes redistribution. When Undress.app output appears on Mastodon, removal proceeds through the statutory takedown process under 47 USC 223a combined with source attribution to strengthen the legal claim.

Why this combination is high risk

Undress.app has been observed using stolen Instagram and TikTok photographs in its marketing previews. It has been the subject of UK Information Commissioner's Office inquiry since 2024. On Mastodon specifically, federated content spreads across multiple instances through reposts and replies. removing from the originating instance does not remove from the cached copies on every instance that federated the post.

How removal proceeds

Mastodon is federated across thousands of independent instances. Removal requires identifying the specific instance hosting the content and contacting that instance's admin directly. Source attribution to Undress.app is documented through undress, which strengthens the takedown notice and supports parallel legal action.

Choose your legal action

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