37 C.F.R. § 382.4
(a) Statements of Account. Any payment due under this part must be accompanied by a corresponding Statement of Account that must contain the following information:
(3) The signature of:
(8) An attestation to the following effect:
I, the undersigned owner/officer/partner/agent of the Licensee have examined this Statement of Account and hereby state that it is true, accurate, and complete to my knowledge after reasonable due diligence and that it fairly presents, in all material respects, the liabilities of the Licensee pursuant to 17 U.S.C. 112(e) and 114 and applicable regulations adopted under those sections.