An employee can be excused from jury duty if you can show that it would cause a real hardship for your company. The request is more likely to be honored if you are very specific with the hardship details, and if you can provide an alternate date.
1234, Main Street
Boston, MA 02123
<Recipient Address Goes Here>
<Our/My> employee <full name> has been summoned to appear for jury duty on <date>. I wish to ask for <short name> to be excused because of the hardship it would place on our company. <Description of hardship.>
<Optional alternate date.>
If you need to verify the circumstances of <short name>'s employment or of this request you can reach me at <telephone number>. Thank you for your consideration in this matter.
encl: <List of enclosed items goes here>