In the world of commerce, law, and daily life, promises are plentiful, but are what give certain promises the force of law. A contractual obligation is a legal duty that arises when two or more parties enter into a valid agreement. Once formed, these duties are not merely moral or social expectations; they are enforceable by a court of law.
These are explicitly stated in the contract, either orally or in writing. They are the "black letter" terms. For example: "Seller shall deliver 500 units of Grade A wheat to Buyer’s warehouse on June 15." If the seller delivers on June 16, they have breached an express obligation. contractual obligations