Contribution, Conveyance, and Assumption Agreement (NCAA) is a contract used to transfer ownership of natural gas and oil exploration and production assets between merging companies. It is a comprehensive agreement that covers the transfer of the exploration and production assets from one company to another, as well as the assumption of liabilities associated with the transferred assets. The NCAA typically includes three parts: the contribution agreement, the conveyance agreement, and the assumption agreement. The contribution agreement outlines the terms of the transfer of the assets from one company to the other. The conveyance agreement outlines the terms of the transfer of the associated liabilities from one company to the other. The assumption agreement outlines the terms of the assumption of the associated liabilities from one company to the other. Types of NCAA include the Exploration and Production NCAA, the Divestiture NCAA, and the Joint Venture NCAA. The Exploration and Production NCAA is used for the transfer of exploration and production assets between merging companies. The Divestiture NCAA is used for the transfer of exploration and production assets from one company to another in a divestiture transaction. The Joint Venture NCAA is used for the transfer of exploration and production assets between merging companies in a joint venture. Keywords: Contribution, Conveyance, Assumption, Natural Gas, Oil Exploration, Mergers, Agreement, Liabilities, Transfer, Exploration, Production, Divestiture, Joint Venture.