It was not possible to sue the Crown in Britain for breach of contract until 1948. However, it was felt that contractors might be reluctant to act on that basis, and the claims were considered part of a petition that had to be approved by the Minister of the Interior and the Attorney-General. S.1 The Crown Proceedings Act 1947 opened the Crown to ordinary contractual claims of the courts as it did for any other person. Coercion has been defined as a “threat of harm made to force a person to do something against his or her will or judgment; in particular, an unlawful threat by a person to force a manifestation of another person`s apparent ostracism into a transaction without real will.  An example is in Barton v. Armstrong  at the home of a person who was threatened with death if he did not sign the contract. An innocent party who wishes to cancel a contract of coercion of the person only has to prove that the threat was made and that this was a reason to accede to the treaty; the burden of proof then lies with the other party to prove that the threat had no effect on the party`s persistence in concluding the contract. There can also be coercion to commodities and sometimes to “economic coercion”. A person who wishes to transport goods by sea may enter into a contract to have the goods processed on another person`s ship. The bill of lading itself is a receipt indicating that the goods were brought on board, proof of the conditions of carriage and a document of ownership that can be used to transfer ownership even if the goods are physically at sea. Britannica.com: Encyclopedia article on agreements an official written agreement between two or more countries. When national leaders negotiate a treaty, they discuss it before reaching an agreement; and when they ratify a treaty, they give it their formal approval, usually by signing it or voting for such an agreement currently exists for pandemic influenza, Phelan notes, but not for any other type of disease or vaccine. Some arbitration clauses are unenforceable and, in other cases, arbitration may not be sufficient to resolve a dispute.
For example, agreeing to sell a car for a penny may constitute a binding contract (although the transaction, if it is an attempt to avoid taxes, will be treated by the tax authorities as if a market price had been paid).  The parties may do so for tax purposes in order to disguise donation transactions as contracts. This is called the pepper rule, but in some jurisdictions, the penny may represent a legally inadequate nominal counterpart. An exception to the adequacy rule is money, where a debt for “agreement and satisfaction” must always be paid in full.     United Nations Convention on the Rights of the Child: A Human Rights Treaty That Establishes the Civil, Political, Economic, Social, Health and Cultural Rights of Children In England and Wales, a treaty can be enforced using a claim or, in an emergency, by seeking an injunction to prevent a violation. .