In United States law, the Bradley Amendment () is an amendment intended to improve the effectiveness of child support enforcement. It is named after Senator Bill Bradley, who introduced it.
The Bradley Amendment requires state courts to prohibit retroactive reduction of child support obligations. Specifically, it automatically triggers a non-expiring lien whenever child support becomes past-due; overrides any state's statute of limitations; disallows any judicial discretion, even from bankruptcy judges; and requires that the payment amounts be maintained without regard for the physical capability of the person owing child support (the obligor) to promptly document changed circumstances or regard for his awareness of the need to make the notification.