The "Dead Man's Statute" provides that if one party to the alleged transaction is precluded from testifying by death, insanity, or other mental disabilities, the surviving party is not entitled to the undue advantage of giving his own uncontradicted and unexplained account of the transaction.⁹ But before this rule can be successfully invoked to bar the introduction of testimonial evidence, it is necessary that:

"1. The witness is a party or assignor of a party to case or persons in whose behalf a case in prosecuted.

2. The action is against an executor or administrator or other representative of a deceased person or a person of unsound mind;

3. The subject-matter of the action is a claim or demand against the estate of such deceased person or against person of unsound mind;

4. His testimony refers to any matter of fact of which occurred before the death of such deceased person or before such person became of unsound mind."¹⁰

THIRD DIVISION

G.R. No. 143340       August 15, 2001

LILIBETH SUNGA-CHAN and CECILIA SUNGA, petitioners,
vs.
LAMBERTO T. CHUA, respondent.