WASHINGTON — Sen. Richard C. Shelby, R-Ala., asked the Office of the Comptroller of the Currency on Friday to determine whether First Union Corp.’s involvement in a multicompany customer data sharing system conflicts with federal privacy requirements.

Sen. Shelby raised these concerns after The Washington Post reported last week that First Union was among several dozen members of the Customer Profile Exchange network, which is designed to make it easier for different computer systems to share consumers’ names, identification numbers and behavioral data.

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