Related Links ARRA Certification Letter (January 22, 2009) ARRA Certification Letter (December 2, 2009) ARRA Certification Letter (September 16, 2009) ARRA Certification Letter (July 30, 2009) ARRA Certification Letter (June 8, 2009) Whistleblower Protections under the Recovery Act DOT Whistleblower Protection Posting External Links US DOT Tiger