John Doe Lawsuit

A John Doe lawsuit is a civil action filed against an unknown defendant using a placeholder pseudonym, such as "John Doe" or "Jane Doe," because most jurisdictions allow a plaintiff who does not yet know who wronged them to sue first and then use the discovery process to learn the defendant's identity. The plaintiff typically follows the filing with a subpoena, sometimes called a Doe subpoena, to a platform or internet provider seeking the records that would unmask the anonymous party.

The device is common in disputes involving anonymous online speech, such as defamation, harassment or fake-review claims, where the would-be defendant is known only by a username. Because anonymous speech is protected by the First Amendment, United States courts do not treat a Doe subpoena as routine discovery; they apply heightened standards, drawn from cases such as Dendrite and Cahill, before compelling a platform to reveal a user's identity. John Doe litigation matters because it is the principal procedural route by which an anonymous Reddit user can ultimately be identified, and the safeguards courts impose are what prevent the mechanism from being used simply to harass or silence critics.