A former Long Island sales representative for Melville-based Carr Business Systems is facing federal charges of mail fraud in connection with office equipment leases.

In an indictment earlier this month federal prosecutors charged that Anthony Masotto, 50, of East Islip, earned $3.4 million in commissions on equipment leases between 2004 and 2010, a figure that was inflated when Masotto and unnamed others allegedly lengthened the terms of an unspecified number of leases from about 36 months to about 63 months without the customers' knowledge.

Masotto pleaded innocent at an arraignment Oct. 3 in federal district court in Central Islip and was released on $100,000 bond by U.S. Magistrate A. Kathleen Tomlinson. His attorney, Frances John Murray of Murray & McCann in Rockville Centre, declined Friday to discuss details of the case.

The indictment, obtained by the office of U.S. Attorney Loretta Lynch in Brooklyn, charges that Masotto's alleged scheme defrauded Carr, certain financial institutions that bought the executed equipment leases, and customers in the New York metropolitan area who leased the equipment.

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Carr customers allegedly victimized, according to the indictment, included The Children's Medical Fund, a charitable group in New Hyde Park; Ameritrust National Mortgage in Lake Success; Mineola Ophthalmology and Big Apple Abstract in Bayside.

Masotto left Carr in 2010 and worked for six months for an office equipment retailing subsidiary of The Workplace Group, an office furniture retailer in Hauppauge, said Workplace president Mark Damico. He left in March 2011.