(a) Filing a response to a counterclaim. Within 30 days following the Board's issuance of notification that a counterclaim is compliant under 37 CFR 224.1, a claimant against whom a counterclaim has been asserted (counterclaim respondent) shall file a response to the counterclaim through eCCB using the response form provided by the Board.

(b) Content of response to a counterclaim. The response to a counterclaim shall include—

(1) The name, mailing address, phone number, and email address of each counterclaim respondent filing the response;

(2) A short statement, if applicable, disputing any facts asserted in the counterclaim;

(3) For infringement counterclaims, as set forth in 37 CFR 222.9(c)(2)(i), a statement describing in detail the dispute regarding the alleged infringement, including any defenses as well as any reason why the counterclaim respondent believes there was no infringement of copyright, including any exceptions and limitations as set forth in 17 U.S.C. 107 through 122 that are implicated;

(4) For declaration of noninfringement counterclaims, as set forth in 37 CFR 222.9(c)(2)(ii), a statement describing in detail the dispute regarding the alleged infringement, including any defenses as well as reasons why the counterclaim respondent believes there is infringement of copyright;

(5) For misrepresentation counterclaims, as set forth in 37 CFR 222.9(c)(2)(iii), a statement describing in detail the dispute regarding the alleged misrepresentation, including any defenses as well as an explanation of why the counterclaim respondent believes the identified words do not constitute misrepresentation; and

(6) For counterclaims arising under an agreement, as set forth in 37 CFR 222.9(c)(2)(iv), a statement describing in detail the dispute regarding the contractual counterclaim, including any defenses as well as an explanation of why the counterclaim respondent believes the counterclaimant's position regarding the agreement lacks merit; and

(7) A certification under penalty of perjury by the claimant, the claimant's legal counsel, or the claimant's authorized representative that the information provided in the response to the counterclaim is accurate and truthful to the best of the certifying person's knowledge and, if the certifying person is not the counterclaim respondent, that the certifying person has confirmed the accuracy of the information with the counterclaim respondent. The certification shall include the typed signature of the certifying person.

(c) Additional matter. The counterclaim respondent may also include, as attachments to or files that accompany the counterclaim response, any material the counterclaim respondent believes play a significant role in setting forth the facts of the claim, such as:

(1) A copy of the copyright registration certificate for a work that is the subject of the proceeding;

(2) A copy of the allegedly infringed work. This copy may also be accompanied by additional information, such as a hyperlink or screenshot, that shows where the allegedly infringed work has been posted;

(3) A copy of the allegedly infringing material. This copy may also be accompanied by additional information, such as a hyperlink or screenshot, that shows any allegedly infringing activity;

(4) A copy of the notification of claimed infringement that is alleged to contain the misrepresentation;

(5) A copy of the counter notification that is alleged to contain the misrepresentation;

(6) A copy of any agreements related to the counterclaim, including any amendments or revisions; and

(7) Any other exhibits that play a significant role in setting forth the facts of the counterclaim response.

(d) Failure to file counterclaim response. A failure to file a counterclaim response within the timeframe required by this section may constitute a default under 17 U.S.C. 1506(u), and the Board may begin default proceedings under part 227 of this subchapter.