Exhibit 31.4
CERTIFICATION
I, R. Mark Graf, certify that:
1. | I have reviewed this Amendment No. 1 to the Annual Report on Form 10-K of Discover Financial Services; and |
2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report. |
Date: February 25, 2016
/s/ R. MARK GRAF | |
R. Mark Graf | |
Executive Vice President and Chief Financial Officer |