For social security, supplemental security income, civil non-military federal retirement and railroad retirement payments use FMS Form 1200 | (Spanish) (Mail to the address at the bottom of the form.)
For all other non-vendor federal payments, use SF 1199A (Mail to the appropriate paying agency, or contact your financial institution.)
For payments to federal vendors, use SF 3881 (Mail to the appropriate paying agency, or contact your financial institution.)
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