It can be tricky to navigate the vast Cook County court system. The Chicago litigation attorneys at Smoler Law can help.A party may direct written interrogatories to any other party. A copy of the interrogatories shall be served on all other parties entitled to notice. 15. These interrogatories and document production requests are of a continuing nature. Documents are to be produced within twenty-eight (28) days of service at. Please be aware that forms will be displayed in a NEW browser window. Summons for Discovery. The primary purposes of discovery: finding out, impeachment and preserving testimony.