What the DMCA actually does
The Digital Millennium Copyright Act (1998) makes a deal with platforms. Section 512(c) says: a marketplace is not liable for infringing files its users upload, as long as it removes them "expeditiously" when a rights holder sends a compliant notice. That safe harbor is the entire leverage of a takedown. Etsy, eBay, and every STL marketplace comply with well-formed notices not out of kindness but because ignoring them puts the platform itself on the hook for the infringement.
Two consequences worth understanding before you file:
- The platform does not judge whether you are right. It checks whether your notice is complete. A valid notice about a borderline case usually succeeds; an incomplete notice about blatant theft usually fails.
- The DMCA is U.S. law, but marketplaces apply their DMCA process globally because they operate in the U.S. market. A creator in Bratislava can file against a seller in Shenzhen on a platform in Brooklyn, and it works.
Do you even hold the copyright?
For most STL creators, yes, automatically. Copyright exists from the moment you create an original sculpt; registration is not required to send a takedown (it is required before you can sue for statutory damages in the U.S.). Two caveats:
- Fan art is shaky ground. If your model depicts someone else's character, you own your sculpt but the underlying character belongs to the studio. You can still have standing against a verbatim re-upload of your file, but expect complications, and never claim more than you own.
- Scans of public-domain objects may not carry copyright at all in some jurisdictions. Original creative sculpts are the clear case.
The six required elements
Section 512(c)(3)(A) lists exactly what a notice must contain. Platforms reject filings for missing any one of these:
- Your signature. Typed full legal name at the end of an email counts as an electronic signature.
- Identification of the original work. Title plus a URL where the original is published (your Cults3D page, your MyMiniFactory listing, your portfolio). If it was never published, describe it and offer the source file as proof.
- Identification of the infringing material. The exact listing URL. One URL per identification; "this whole shop" without itemized URLs gets rejected.
- Your contact information. Name, postal address, email. A phone number helps.
- The good-faith statement. Verbatim is safest: "I have a good faith belief that use of the material in the manner complained of is not authorized by the copyright owner, its agent, or the law."
- The accuracy statement under penalty of perjury. Verbatim: "The information in this notification is accurate, and under penalty of perjury, I am authorized to act on behalf of the owner of an exclusive right that is allegedly infringed."
Where each marketplace takes notices
Every platform publishes its own intake channel, and they change addresses occasionally, so always confirm on the platform's own copyright or legal page before sending. As of mid-2026:
- Etsy runs a web-based intellectual property reporting portal linked from its IP policy page. Form submissions are processed much faster than postal or email notices.
- eBay handles rights owners through its VeRO program (Verified Rights Owner). First filing requires a short enrollment; after that, reporting is form-based and fast.
- Cults3D accepts copyright complaints through its contact channels and publishes a dedicated counterfeit-reporting flow for designers.
- MyMiniFactory takes DMCA notices via its support and legal contact published in its terms.
- Thingiverse publishes a DMCA intake in its terms of use.
- MakerWorld (Bambu Lab) has an in-platform report flow plus a published IP complaint channel.
- Printables (Prusa) accepts reports through its content-report flow and published legal contact.
Payment processors and hosts are a second front: if a thief sells through their own site, the same notice format goes to the site's hosting provider (find it via WHOIS) and, where applicable, the payment processor's IP-abuse channel.
What happens after you file
- The platform reviews completeness, usually within one to three business days on the big marketplaces.
- If complete, the listing comes down and the seller is notified, with your notice (including your name and email) typically forwarded to them.
- The seller can file a counter-notice under §512(g) swearing the removal was a mistake. If they do, the platform must restore the listing in 10 to 14 business days unless you file a court action in that window. Most thieves never counter-notice; doing so under penalty of perjury with their real identity is exactly what they want to avoid.
- If the same seller re-uploads, file again and cite the prior takedown. Platforms must terminate repeat infringers (§512(i)) to keep their safe harbor, so a documented history compounds.
The honesty rule
Section 512(f) makes knowingly false claims expensive: misrepresent that material is infringing and you are liable for the other side's damages and legal fees. Practical rules that keep you safe:
- Only file against work you actually own or are authorized to enforce.
- Do not file against fair use, parody, or genuinely transformative work just because it annoys you.
- Say "suspected" until verified. Accuse listings, not people.
The part nobody warns you about
Filing one notice takes 20 to 45 minutes once you have the template: finding the listing, capturing evidence before it disappears (screenshot, URL, date), locating the current intake address, drafting, sending, logging the response, calendaring the counter-notice window. The notice is not the hard part. The hard part is doing it every week, across seven marketplaces, while the same file resurfaces under new names. That second shift is the reason Cult Shield exists: detection, evidence capture, drafting, and filing in one loop, with you approving every notice. If you would rather keep it manual, this primer plus a spreadsheet is genuinely enough. Either way, file clean notices.
Not legal advice
This guide is general education about a U.S. statute, not legal advice, and Cult Shield is not a law firm. For litigation, statutory damages, or anything beyond notice-and-takedown, talk to an IP attorney in your jurisdiction.