Rules on Evidence
Section 29. Admission by co-partner or agent. - The act or declaration of a partner or agent of the party within the scope of his authority and during the existence of the partnership or agency, may be given in evidence against such party after the partnership or agency is shown by evidence other than such act or declaration. The same rule applies to the act or declaration of a joint owner, joint debtor, or other person jointly interested with the party. (26a)