Delaware Court of Chancery Rule 5.1 defines the requirements for court filings to receive confidential treatment, contrary to the presumption that all court filings should be made available to the public. (The former terminology “under seal” is no longer used in the current version of the rule.) A recent Chancery decision addressed the filing of
Delaware Supreme Court Refuses to Seal Letter Regarding Former CEO of Hewlett-Packard
Hurd v. Espinoza and Hewlett-Packard Company, No. 167, 2011 (Del. Supr., Dec. 28, 2011; corrected on Dec. 29, 2011), read Delaware Supreme Court opinion here. The 
Chancery decision appealed from was highlighted on these pages here. The New York Times online article about this Supreme Court decision is available here. The separate Delaware Supreme