When a judgment creditor registers a judgment in a different federal district court under 28 USC 1963 for the purpose of enforcing the judgment, the registered judgment does not take on a life of its own, but remains linked to, and dependent on, the original judgment. If, as in this case, the original judgment is vacated after being registered in a different district, the registered judgment is no longer enforceable, and the case begun by registering the judgment is properly dismissed.