In the United States, potential jury members are officially notified of their duty to serve by a summons. A summons is a legal document that commands the recipient to appear in court at a designated time and date. This method is used to ensure that individuals are formally informed of their obligation to participate in the judicial process. Other methods such as phone calls, emails, or text messages may be used for reminders or additional information, but the initial notification is typically done through a summons due to its legal significance. Failure to respond to a summons can lead to legal repercussions, emphasizing its importance in the jury selection process.