On February 25, 2020, the United States Supreme Court in Rodriguez v. Federal Deposit Insurance Corporation^[1] struck down a judicial federal common law rule—known as the Bob Richards rule—that is used by courts to allocate tax refunds among members of a corporate affiliated group where the group does not have a written tax sharing agreement in place, or, at least in some federal Circuits, where an agreement fails to allocate the refunds unambiguously.