Article 12 Defenses is a legal doctrine in private international law that constitutes the set of substantive justifications recognized under Article 12 of the 1980 Hague Convention on the Civil Aspects of International Child Abduction, distinguishing itself by permitting the retention of a child in a contracting state when the applicant had not been exercising custody rights at the time of removal or retention, or had consented to or subsequently acquiesced in the removal or retention.