What must happen if a subpoena requires confidential information?

When a subpoena requires the disclosure of confidential information, it is essential for the recipient to take appropriate legal measures to protect that information. In this context, the correct course of action is for the recipient to file a motion to quash or modify the subpoena. This legal mechanism allows the recipient to challenge the validity of the subpoena, arguing that the requested information is confidential and should not be disclosed without proper legal justification or protection.

This process acknowledges the importance of confidentiality and ensures that sensitive information is not disclosed inappropriately. By filing a motion, the party can ask the court to review the subpoena and make a determination on whether the confidential nature of the information warrants preventing its disclosure or establishing specific protections.

Considering the other options, simply disclosing the information within a set timeframe, providing it only to the court, or ignoring the subpoena may not adequately address the legal protections surrounding confidential information and could lead to serious consequences for failure to comply or protect sensitive data. The approach outlined in the correct answer prioritizes the maintenance of confidentiality while also complying with legal procedures.