Depending upon the type of bond, either electronic or paper, you can redeem or cash in E and EE government savings bonds online, by mail or in person at many financial institutions. You can find more information about government savings bonds at TreasuryDirect.gov.
You can redeem electronic bonds at TreasuryDirect.gov by following the step-by-step directions given on the website, as of 2015. You can cash in bonds in person at many local financial institutions, including bank branches. Banks may restrict the cashing of bonds to a maximum value for individuals who don't hold an account at that particular bank. The final option is mailing your bonds to Treasury Retail Securities Site, P.O. Box 214, Minneapolis, MN, 55480-0214. Include a notarized letter confirming your request and providing your signature.