This type of NDA eliminates the need for separate unilateral or bilateral non-disclosure agreements between only two parties. For example, a single multi-party non-disclosure agreement concluded by three parties, each intending to share information with the other two parties, could be used instead of three separate bilateral non-disclosure agreements between the first and second parties, the second and third parties, and the third and first parties. Option Agreement – An agreement where one party pays the other for the opportunity to use an innovation, idea or product later. .