EXHIBIT 16.1 [Letterhead of Arthur Andersen LLP] Office of the Chief Accountant Securities and Exchange Commission 450 Fifth Street, N.W. Washington, D.C. 20549 October 9, 2001 Dear Sir/Madam: We have read paragraph (a) of Item 4 included in the Form 8-K dated October 9, 2001 of PTEK Holdings, Inc. filed with the Securities and Exchange Commission and are in agreement with the statements contained therein. Very truly yours, /s/ Arthur Andersen LLP Copy to: Mr. Patrick G. Jones, Executive Vice President, Chief Financial Officer and Chief Legal Officer, PTEK Holdings, Inc. 6