A Declaration of Parentage declares whether a named person is or is not the legal or biological parent of another person under English law. It can clarify and confirm parentage or alternatively, it can declare the removal of parentage for English legal purposes. Recently, there have been several cases involving Declarations of Parentage following legal disputes after unregulated sperm donation involving serial sperm donor Joe Donor, rushed licensed sperm donation and disputed co-parenting arrangements as well as disputes about whether a child was conceived naturally or by assisted conception. Added to this, applications for a Declaration of Parentage can be relevant when people seek to correct or re-register a birth certificate for a variety of reasons.