20 C.F.R. § 302.7
(c) Employer fails to report. When an employer has failed or refuses to file a report under part 209 of this chapter, an employee may establish his or her base year service and compensation by submitting:
(2) Statements, under oath or otherwise, signed by an officer or a duly authorized employee of the employer, or if not so signed, on forms prepared by the employer.
(Approved by the Office of Management and Budget under control numbers 3220-0025 and 3220-0070)