What method of discovery involves written questions that a party must answer in writing under oath?

The method of discovery involving written questions that a party must answer in writing under oath is known as interrogatories.

Interrogatories are a formal set of questions directed to a party in a lawsuit, which must be answered within a specific timeframe. The responses are given under oath, making them legally binding. This process allows the requesting party to gather relevant information and clarify issues prior to trial, facilitating a better understanding of the facts at hand and the position of the opposing party.

In contrast, oral depositions involve the in-person questioning of a witness or party, where answers are recorded but not given in written form. Requests for admissions are aimed at having the other party admit or deny specific statements, working more toward establishing undisputed facts rather than gathering detailed information. The production of documents requires a party to provide documents pertinent to the case and does not involve answering questions in written form. Each of these discovery tools serves a unique purpose in the litigation process, but it is the interrogatories that specifically require sworn written responses to questions posed.