Copyright Takedown Procedure

Last updated: 2026-04-08

Σmind respects the intellectual property rights of others and complies with both the UK Electronic Commerce (EC Directive) Regulations 2002, Regulation 19 ("hosting" defence), and the US Digital Millennium Copyright Act (DMCA), 17 U.S.C. §512. If you believe content hosted on Σmind infringes your copyright, please follow the procedure below.

Send a takedown notice

To request removal of allegedly infringing content, send a written notice to:

Σmind copyright agent Email: dmca@sumofmind.co.uk Subject line: COPYRIGHT TAKEDOWN — [content URL]

Your notice must contain all of the following to be valid under §512(c)(3) of the DMCA:

1. A physical or electronic signature of the copyright owner or someone authorised to act on their behalf.
2. Identification of the copyrighted work claimed to have been infringed (or a representative list if multiple works).
3. Identification of the material on Σmind you claim is infringing — including the URL or file ID — sufficient for us to locate it.
4. Your contact information: address, telephone number, and email address.
5. A statement that you have a good-faith belief that the use of the material is not authorised by the copyright owner, its agent, or the law.
6. A statement, made under penalty of perjury, that the information in the notice is accurate and that you are authorised to act on behalf of the copyright owner.

For UK rights-holders the same notice format works — the UK regime under Regulation 19 of the eCommerce Regulations does not require a specific form, but the items above ensure we can act on your notice without further clarification.

What we will do

• We will acknowledge receipt of your notice within 24 hours.
• If the notice meets the §512(c)(3) requirements, we will remove or disable access to the allegedly infringing material expeditiously.
• We will notify the user who uploaded the material and inform them of the takedown.
• The user may submit a counter-notice (see below).

Counter-notice procedure

If your content has been removed in response to a takedown notice and you believe the removal was in error, you may submit a counter-notice. Send the following to dmca@sumofmind.co.uk:

1. Your physical or electronic signature.
2. Identification of the material that was removed and its location before removal.
3. A statement, made under penalty of perjury, that you have a good-faith belief that the material was removed as a result of mistake or misidentification.
4. Your name, address, and telephone number, and a statement that you consent to the jurisdiction of the appropriate court.

On receipt of a valid counter-notice we will forward it to the original complainant. Unless the complainant files a court action against you within 10–14 business days, we will restore the removed material.

Repeat infringers

Σmind operates a published repeat-infringer policy: two valid takedowns against the same account result in a temporary suspension of the citation library; three result in termination at our discretion. This policy is part of our compliance with §512(i) DMCA and the analogous UK regime.

Misuse of this procedure

Submitting a false takedown notice — for example, claiming content is infringing when you do not own the rights — exposes you to personal liability under §512(f) DMCA, including for the costs and attorney's fees incurred by Σmind and the affected user. Please do not abuse this process.

Designated agent

Our DMCA designated agent is registered with the United States Copyright Office. The current contact details are listed in the US Copyright Office Directory of Service Providers under "Σmind / Sigmamind". UK rights-holders may also use the email address above without going through the US directory.