Attached files
EXHIBIT 32.2
CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TOSECTION 906 OF THE
SARBANES-OXLEY ACT OF 2002
In connection with the Quarterly Report of Westamerica Bancorporation (the Company) on Form 10-Q
for the period ended March 31, 2011 as filed with the Securities and Exchange Commission on the
date hereof (the Report), I, John Robert Thorson, Chief Financial 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.
/s/ John Robert Thorson
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Senior Vice President and Chief Financial Officer |
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Date: May 2, 2011 |