Delaware Summons In Section 304 Ancillary Proceeding is a legal document used to initiate an ancillary proceeding pursuant to Section 304 of the Delaware General Corporation Law. An ancillary proceeding is used to settle a dispute between two related companies or between a company and its shareholders. The Delaware Summons In Section 304 Ancillary Proceeding is issued by the Delaware Court of Chancery and is served to all parties involved in the dispute. There are two types of Delaware Summons In Section 304 Ancillary Proceeding: the first summons is an original summons, which is served on the plaintiff who initiated the proceeding; and the second summons is a supplemental summons, which is served on the defendant. Both summonses contain the notice of ancillary proceeding and the court’s order appointing a special master to preside over the ancillary proceeding. The summons also requires the defendant to respond to the complaint by a certain date and time.