I bought a series E bond in 1977 and never gave it to the intended party. How can I now cash it in?
If your name isn't on it could be a problem.
Since it is from some time in the past, you can check with your local bank if you can be able to cash it in. You can also consult with your local government about the best way to cash it in.
Unless you have certifiable proof of purchase, you most likely would need the endorsement of the person you originally bought it for.