CITIZENS & NORTHERN CORPORATION - FORM 10 - Q EXHIBIT 99.1 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Quarterly Report of Citizens & Northern Corporation (the Corporation) on Form 10-Q for the nine month period ended September 30, 2002, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned hereby certify, pursuant to 18 U.S.C. section 1350, as adopted pursuant to section 906 of the Sarbanes-Oxley Act of 2002, that to each of the undersigned's best knowledge and belief: (a) the Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and (b) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Corporation. CITIZENS & NORTHERN CORPORATION November 13, 2002 By: Craig G. Litchfield /s/ - ----------------- ----------------------- Date Chairman, President and Chief Executive Officer November 13, 2002 By: Mark A. Hughes /s/ - ----------------- ------------------ Date Treasurer and Chief Financial Officer 28