A jury questionnaire is a form that potential jurors fill out prior to voir dire

Voir dire

Voir dire is a phrase in law which comes from the Anglo-Norman language. In origin it refers to an oath to tell the truth , i.e., to say what is true, what is objectively accurate or subjectively honest, or both....

. They are used in virtually all high-profile cases. Many jurisdictions "qualify" jurors by selecting only those who receive, complete, and return jury questionnaires. Some studies have found that large percentages of jury questionnaires are returned as undeliverable or are not returned by the recipients.