If you are a National Bank:
National banks that become aware of counterfeit or stolen financial instruments are encouraged to notify the OCC's Special Supervision Division by e-mail at occalertresponses@occ.treas.gov or telephone at (202) 649-5470, and are required to notify law enforcement of certain suspected violations of law and suspicious transactions by filing a Suspicious Activity Report pursuant to 12 CFR 21.11.
I'm not aware of similar guidance from the other agencies, but maybe someone else can chime in.
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