Alteration

A change in the terms of a contract, made by the agreement of the parties thereto. An act done upon an instrument in writting by a party entitled under it, without the consent of the other party, by which its meaning or language is changed. The term is properly applied to the change in the language of instruments, and is not used of changes in the contract itself; and it i^ in strictness to be distinguished from the act of a stranger in changing the form or language of the instrument, which is called a "spoliation." This latter distinction is not always observed in practice, however. ALTERIUS CIRCUMVENTIO ALII NON praebet actionem.

Dig. 50. 17. 49.

A deception practiced upon one person does not give a cause of action to another.