In law, a legal person is any person or 'thing' (less ambiguously, any legal entity) that can do the things a human person is usually able to do in law – such as enter into contracts, sue and be sued, own property, and so on. The reason for the term "legal person" is that some legal persons are not people: companies and corporations are "persons" legally speaking (they can legally do most of the things an ordinary person can do), but they are clearly not people in the ordinary sense.
|Management of a business|
There are therefore two kinds of legal entities: human and non-human. In law, a human person is called a natural person (sometimes also a physical person), and a non-human person is called a juridical person (sometimes also a juridic, juristic, artificial, legal, or fictitious person, Latin: persona ficta).
While natural persons acquire legal personality "naturally", simply by being born (or before that, in some jurisdictions), juridical persons must have legal personality conferred on them by some "unnatural", legal process, and it is for this reason that they are sometimes called "artificial" persons. In the most common case (incorporating a business), legal personality is usually acquired by registration with a government agency set up for the purpose. In other cases it may be by primary legislation: an example is the Charity Commission in the UK. The United Nations Sustainable Development Goal 16 advocates for the provision of legal identity for all, including birth registration by 2030 as part of the 2030 Agenda.
As legal personality is a prerequisite to legal capacity (the ability of any legal person to amend (enter into, transfer, etc.) rights and obligations), it is a prerequisite for an international organization to be able to sign international treaties in its own name.