Pennsylvania's interrogatories are written questions served by one party to another in a civil lawsuit. These questions, which must be answered in writing and under oath, are used to gain facts and information for a case. The answers to the interrogatories can later be used as evidence in court. There are two types of interrogatories in Pennsylvania: general interrogatories and special interrogatories. General interrogatories are interrogatories that are generally applicable to all cases and can be used to gain information about the facts of the case, the parties involved, and the legal theories. Special interrogatories are interrogatories that are tailored to a specific case and may be used to acquire more specific information, such as the identity of witnesses, requests for documents, and admissions of facts.