Equifax Inc. said it is expanding its global transaction processing business and appointed two executives, Gerald A. Hines and Thomas R. Malin, to lead its efforts.

Mr. Malin, senior vice president of international card and retail operations, will be in charge of joint ventures and alliances. He joined Equifax several months ago from Electronic Data Systems Corp., where he was executive vice president of card processing.

Mr. Hines, who joined Equifax from AT&T Universal Card Services, where he was chief operating officer, will be in charge of Equifax's card operations and technology.

Separately, Equifax said it doubled its stake in Veraz, Argentina's largest credit bureau, to two-thirds of equity.

Veraz's data base, with over 25 million names and addresses, serves financial institutions' consumer marketing needs.

Equifax first invested in Veraz in 1994 along with Banelco, a consortium of Argentina's largest banks. Gabriel Yelin, one of the founders of Veraz, will remain president of the company.

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