This paper analyses Article 5 and Article 6 of the Paris Agreement and examines whether current REDD+ decisions are sufficient to initiate the use of cooperative approaches under Article 6.2 for REDD+. The paper finds that cooperation on REDD+ can start now under Article 6.2, but additional guidance is needed on how to meet meet certain environmental integrity requirements to use internationally transferred mitigation outcomes (ITMOs). Such guidance, however, does not have to come from the UNFCCC. Parties cooperating under Article 6.2 can agree amongst themselves on detailed, REDD+ specific guidance and approaches, particularly with regard to environmental integrity and robust accounting requirements. Third-party standards for existing REDD+ could help inform such approaches and form a resource for countries.