Exhibit 15.1
Letter from Ernst & Young LLP Regarding Unaudited Interim Financial Information
The Board of Directors and Stockholders of The Western Union Company
We are aware of the incorporation by reference in this Registration Statement (Form S-3) and related Prospectus of The Western Union Company for the registration of 6,000,000 shares of its common stock of our reports dated May 6, 2013 and August 7, 2013 relating to the unaudited condensed consolidated interim financial statements of The Western Union Company that are included in its Forms 10-Q for the quarters ended March 31, 2013 and June 30, 2013.
/s/ Ernst & Young LLP
Denver, Colorado
October 3, 2013