EXHIBIT 16 Securities and Exchange Commission 450 Fifth Street, N.W. Washington, DC 20549 Ladies and Gentlemen: We have read Item 4 of Form 8-K dated March 25, 2002 for United Security Bancshares, Inc. and are in agreement with the statements contained in the second and third paragraph on page 2 therein. We have no basis to agree or disagree with other statements of the registrant contained therein. Birmingham, Alabama /s/ Arthur Andersen LLP March 25, 2002