Contracts always need to be freely agreed by all sides participating in the contract. It will always be done under a common agreement by all parts, and when the main cause is not fulfilled or any of the parts is not freely agreeing to the terms, it will be not considered valid.
It is also important to bear in mind how some groups (such as under aged, mentally disabled) require special conditions when being part in a contract.
Contracts always need to be freely agreed by all sides participating in the contract. It will always be done under a common agreement by all parts, and when the main cause is not fulfilled or any of the parts is not freely agreeing to the terms, it will be not considered valid.
It is also important to bear in mind how some groups (such as under aged, mentally disabled) require special conditions when being part in a contract.