Bring every document you have, even if it seems minor: contracts, letters, court papers, emails and screenshots.
Write a one-page timeline with dates. Add a list of the questions you most want answered.
Do not worry about order. Part of the first call is working out what matters.
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras pulvinar nulla id enim pellentesque, ut dictum eros tempus. Proin et bibendum lectus. Nullam laoreet enim ac orci tristique condimentum. Curabitur sed posuere diam. Suspendisse ornare turpis eget laoreet aliquet. Vestibulum at porttitor massa. Nam pellentesque justo ac justo vestibulum tincidunt. Vivamus sed nisi non est hendrerit consectetur at non nibh.