Grant all that, and still it is clear that where the contract is for the payment of a certain sum of money, and the promise is expressed in dollars, or in coined dollars, the promisee, if he sees fit, may lawfully refuse to accept payment in any other medium than gold and silver, made a legal tender by act of congress passed in pursuance of that provision of the constitution which vests in congress the power to coin money, regulate the value thereof and of foreign coin.
"Monopolies and the People"
D. C. Cloud
Stipulation, however, as has already been remarked, derive their validity from the consent of the contracting parties, and we therefore introduced a necessary emendation in respect also of this rule of law, by providing that a stipulation shall be good which bargains for performance either after the death, or the day before the death, of either promisee or promisor.
"The Institutes of Justinian"
Caesar Flavius Justinian
And even though the specific thing for which the promisee sues be of little or no value, it is still an overclaim: for it is often easier for a debtor to pay what is of greater value than what is actually demanded of him.
"The Institutes of Justinian"
Caesar Flavius Justinian