Amazon.com (AMZN) 10-Q 2012 Q3 Quarterly report

Exhibit 32.2

Certification Pursuant to 18 U.S.C. Section 1350

In connection with the Quarterly Report of Amazon.com, Inc. (the “Company”) on Form 10-Q for the three months ended September 30, 2012 as filed with the Securities and Exchange Commission (the “SEC”) on or about the date hereof (the “Report”), I, Thomas J. Szkutak, Senior Vice President and 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.

A signed original of this written statement has been provided to the Company and will be retained by the Company and furnished to the SEC or its staff upon request.

/S/ THOMAS J. SZKUTAK     

Thomas J. Szkutak

Senior Vice President and

Chief Financial Officer

(Principal Financial Officer)

Date: October 25, 2012