Summoned for Jury Duty

AJ sent me an instant message that he received a letter from Superior Court of Kern County that I'm summoned for Jury Duty on August 23. I'm just wondering why they'll summon me when I changed my address to LA on my driver's license. I had my California ID in Bakersfield but my driver's license information is the most recent ones.. Hmmmm.. looks like there's a mistake there. And only US citizens can be summoned... another mistake. Actually, I told my co-worker about it and his wife was summoned too. I just need to request for excuse, he told me. I called the jury services and I just need to fax a signed letter that I no longer live in Bakersfield.