Joint Declaration on the Doctrine of Justification

The Joint Declaration on the Doctrine of Justification (JDDJ) is a document created and agreed to by the Catholic Church's Pontifical Council for Promoting Christian Unity (PCPCU) and the Lutheran World Federation in 1999 as a result of Catholic–Lutheran dialogue. It states that the churches now share "a common understanding of our justification by God's grace through faith in Christ." To the parties involved, this essentially resolves the 500-year-old conflict over the nature of justification which was at the root of the Protestant Reformation. The World Methodist Council adopted the Declaration on 18 July 2006. The World Communion of Reformed Churches (representing the "80 million members of Congregational, Presbyterian, Reformed, United, Uniting, and Waldensian churches"), adopted the Declaration in 2017.

In substance, the PCPCU and the Lutheran World Federation acknowledge in the declaration that the excommunications relating to the doctrine of justification set forth by the Council of Trent do not apply to the teachings of the Lutheran churches set forth in the text; likewise, the churches acknowledged that the condemnations set forth in the Lutheran Confessions do not apply to the Catholic teachings on justification set forth in the document.