This scam is spreading fast so be prepared should you get this
call.
Most of us take those summons for jury duty seriously, but enough
people skip out on their civic duty, that a new and ominous kind of
scam has surfaced.  Fall for it and your identity could be stolen, reports CBS. 

In this con, someone calls pretending to be a court official who
threateningly says a warrant has been issued for your arrest because
you didn't show up for jury duty. The caller claims to be a jury
coordinator. If you protest that you never received a summons for
jury duty, the scammer asks you for your Social Security number and
date of birth so he or she can verify the information and cancel the
arrest warrant.  Sometimes they even ask for credit card numbers.
Give out any of this information and bingo! Your identity just got
stolen.

The scam has been reported so far in 11 states, including Oklahoma,
Illinois, and Colorado.  This (scam) is particularly insidious
because they use intimidation over the phone to try to bully people
into giving information by pretending they're with the court
system. The FBI and the federal court system have issued nationwide alerts
on their web sites, warning consumers about the fraud.

http://www.snopes.com/crime/fraud/juryduty.asp