Promises. Capacity. Delivery of Deeds. Formation. Offer and acceptance. Incorporation of terms. Construction. Implied terms. Jus Quaesitum tertio. Joint and several liability. Assignation. Invalidities. Fraud. Error. Facility and circumvention and undue influence. Extortion, lesion and good faith. Unfair terms. Public policy. Breach. Frustration. Damages. Specific implement and interdict. Payment. Variation and extinction. Death and insolvency. Jurisdiction and conflict of laws.