Summary of COMMERCIAL NATIONAL FINANCIAL CORP /PA

Item 4.01 Changes in Registrant's Certifying Accountant.

On October 1, 2009, Commercial National Financial Corporation, ("Corporation") was notified that the audit practice of Beard Miller Company LLP ("Beard") an independent registered public accounting firm, was combined with ParenteBeard LLC ("ParenteBeard") in a transaction pursuant to which Beard combined its operations with ParenteBeard and certain of the professional staff and partners of Beard joined ParenteBeard either as employees or partners of ParenteBeard. On October 1, 2009, Beard resigned as the auditors of the Corporation and, with the approval of the Audit Committee of the Corporation's Board of Directors, ParenteBeard was engaged as its independent registered public accounting firm.

Prior to engaging ParenteBeard, the Corporation did not consult with ParenteBeard regarding the application of accounting principles to a specific completed or contemplated transaction or regarding the type of audit operations that might be rendered by ParenteBeard on the Corporation's consolidated financial statements, and ParenteBeard did not provide any written or oral advice that was an important factor considered by the Corporation in reaching a decision as to any such accounting, auditing or financial reporting issue.

The report of the independent registered public accounting firm of Beard regarding the Corporation's financial consolidated statements for the fiscal years ended December 31, 2008 and 2007 did not contain any adverse opinion or disclaimer of opinion and was not qualified or modified as to uncertainty, audit scope or accounting principles.

During the years ended December 31, 2008 and 2007, and during the interim period from the end of the most recently completed fiscal year through October 1, 2009, the date of resignation, there were no disagreements with Beard on any matter of accounting principles or practices, financial statement disclosure or auditing scope or procedures, which disagreements, if not resolved to the satisfaction of Beard would have caused it to make reference to such disagreement in its reports.

The Corporation provided Beard with a copy of this Current Report on Form 8-K prior to its filing with the Securities and Exchange Commission and requested that Beard furnish the Corporation with a letter addressed to the Securities and Exchange stating whether it agrees with above statements and, if it does not agree, the respects in which it does not agree. A copy of the letter, dated October 5, 2009, is filed as Exhibit 16 (which is incorporated by reference herein) to this Current Report on Form 8-K.