Is this true under the California Probate and Evidence Codes?
No. A natural person is a human being (as contrasted with an "entity" - a corporation, a partnership, etc.).
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So long as the trust is a "revocable living trust", then the trust is a "see through" item, and will not be treated as a real person, as the trust can been looked through to the owners (trustors). If the trust is an irrevocable trust that is treated as an entity under the laws of the jurisdiction in which it is created then it will be treated as a natural person.
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