Del. Code Ann. tit. 25, § 1601
(a) In any action instituted in any court of this State having civil jurisdiction or in the United States District Court for the District of Delaware, any party asserting a claim, the object of which is to affect the title to, or enforce an equitable lien on, real estate may, after filing of such claim, file in the office of the recorder of deeds of any county in which all or any part of the affected real estate is situate a written notice of the pendency of the action, which shall be under oath, and shall set forth:
(b) No notice of pendency shall be filed under this chapter: