In civil law there are three classifications of important assumptions to distinguish:
- Legal fact.
- Juridical act.
- Legal business.
The legal business is a manifestation of the will of one or more parties aimed at producing legal effects.
Examples of legal business: Agreement and contract.
However, the following are elements of validity of the legal business (contract and agreement):
l.- The capacity of exercise of the author or the parties;
II.- The unstale will;
III.- The legality in the indirect object in the reason or purpose or in the condition of the business;
IV.- The form.
For the will to oblige, it must:
I.- Be expressed by a capable person; and
II.- Not to be flawed.
The one who has the capacity to enter into a legal business can do so by himself or through another legally authorized.
No party may engage on behalf of another party without being authorized by him or by law.
The will is not valid if it has been given by mistake, fear or fraud.