EXHIBIT 16. LETTER FROM PRICEWATERHOUSECOOPERS LLP, DATED SEPTEMBER 7, 2004. September 7, 2004 Securities and Exchange Commission 450 Fifth Street, N.W. Washington, D.C. 20549 Commissioners: We have read the statements made by CDSI Holdings Inc. (copy attached), which we understand will be filed with the Securities and Exchange Commission, pursuant to Item 4.01 of the Form 8-K dated September 7, 2004. We agree with the statements concerning our Firm in such Form 8-K. Very truly yours, /s/ PRICEWATERHOUSECOOPERS LLP MIAMI, FL