Wells Fargo & Co. is e-mailing participating cardholders automated teller machine receipts as part of a pilot test that began in January.

An undisclosed number of San Francisco residents are participating in the test. The receipts are sent to their online banking accounts (having one is a prerequisite for participation) or to their personal e-mail accounts.

The e-mail option reduces paper use, Wells Fargo said.

Nearly 8% of online San Francisco customers have requested e-mail ATM receipts, Jonathan G. Velline, Wells' senior vice president of ATM banking and distribution strategies, told the San Francisco Chronicle's Technology Chronicles blog.

"Customers are used to online and mobile banking to track their finances, so figuring out ways to move the ATM channel into the way they're working is important," Velline said.

The move to e-mail also helps reduce litter around the company's branches, he said.

Velline told the blog that the rest of the Bay Area will get the e-mail option this spring and that the service will go nationwide this year.

Wells Fargo is the nation's third-largest bank owner of ATMs, with 12,363 machines as of last quarter. It buys its ATMs from NCR Corp., Wincor Nixdorf AG and Diebold Inc.

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