The Treasury Department is facing a March 1 deadline to get millions of people who still receive benefit payments by mail to convert to electronic delivery.

Affected are those receiving Social Security, Supplemental Security Income, Veterans ­Affairs, Railroad Retirement Board or Office of Personnel Management benefits and other nontax federal payments. The government has been gradually phasing out paper checks to save money. It costs 92 cents more to issue a paper check than electronically depositing the benefit money.