How does one cash in "HH" bonds? Can it be done through a bank (like "I" bonds) or via mail to the Treasury Department? Tom's response Take Series HH bonds to your local bank to have them redeemed. They will have to certify your signature on the back of the bonds and they will forward them to the Federal Reserve for you. However, watch out for the HH-bond hidden interest penalty. These bonds pay interest every six months. You should redeem them right after you receive an interest payment. You will lose all the interest you've earned between the interest payment date the redemption date, so if you're due an interest payment next month, it's better to wait until then to redeem your HH bonds. There is additional information on cashing HH bonds on our web site. Click here to visit the premier independent web site for Savings Bond owners.