[VIDEO]: Southwestern Law School’s Visiting Associate Professor Amy Peikoff explains the Third Party Doctrine of the Supreme Court’s Fourth Amendment Doctrine. Under the Third Party Doctrine, the government does not need a warrant in order to obtain information entrusted to a third party, such as a bank, cell phone company, or email server. Thus, individuals who utilize their personal server for email may effectively keep their emails private while those using a commercial email server such as Gmail do not have the same privacy.