How do you verify a U.S. Treasury check?
For those with telephones, call +1(800)826-9434 with check questions.
According to the U.S. Department of the Treasury website,
you may verify U.S. Treasury checks online at
https://TCVA.FMS.Treas.gov/.
Click the CheckVerification link on the left side of the Web page,
then enter the routing-transit number, (254075409),
check number and check amount, and click Verify.