This Practice Note provides an overview of the SEC and state-level filing requirements for Form D, together with an item-by-item explanation of the form's disclosure requirements. It covers who must file a Form D with the SEC and when it must be filed, how to obtain a Central Index Key (CIK) number and EDGAR access codes, when amendments are required, and the consequences of failing to file a Form D with the SEC. This Practice Note also explains the blue sky notice filing requirements for offerings under Rule 506 of Regulation D.