Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in this Registration Statement on Form S-3 of our reports dated January 26, 2009, relating to the consolidated and combined financial statements of Discover Financial Services (which report expresses an unqualified opinion and includes an explanatory paragraph relating to Discover Financial Services’ adoption of Financial Accounting Standards Board Interpretation No. 48,Accounting for Uncertainty in Income Taxes, on December 1, 2007), and the effectiveness of internal control over financial reporting, appearing in the Annual Report on Form 10-K of Discover Financial Services for the year ended November 30, 2008, and to the reference to us under the heading “Experts” in the Prospectus, which is part of this Registration Statement.
/s/ DELOITTE & TOUCHE LLP
Chicago, Illinois
April 8, 2009
