California Evidence Code Section 1261
(a) Evidence of a statement is not made inadmissible by the
hearsay rule when offered in an action upon a claim or demand against
the estate of the declarant if the statement was made upon the
personal knowledge of the declarant at a time when the matter had
been recently perceived by him and while his recollection was clear.
(b) Evidence of a statement is inadmissible under this section if
the statement was made under circumstances such as to indicate its
lack of trustworthiness.