EXHIBIT 32(a)

                            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 Annual Report of CheckFree Corporation (the
"Company") on Form 10-K for the fiscal year ended June 30, 2005 as filed with
the Securities and Exchange Commission on the date hereof (the "Report"), I,
Peter J. Kight, Chairman and Chief Executive Officer of the Company, certify,
pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, that:

          (1) The Report fully complies with the requirements of Section 13(a)
or 15(d) of the Securities Exchange Act of 1934; and

          (2) The information contained in the Report fairly presents, in all
material respects, the financial condition and results of operations of the
Company.


Date: September 2, 2005                 /s/ Peter J. Kight
                                        ----------------------------------------
                                        Peter J. Kight
                                        Chairman and Chief Executive Officer
                                        CheckFree Corporation



This Certification is being furnished solely to accompany the Report pursuant to
18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley
Act of 2002 and shall not be deemed "filed" by the Company for purposes of
Section 18 of the Securities Act of 1933, as amended, or the Securities Exchange
Act of 1934, as amended, whether made before or after the date of this Report,
irrespective of any general incorporation language contained in such filing.