HEIRS OF VICTOR AMISTOSO, NAMELY: VENEZUELA A. DELA CRUZ, FLORA A. TULIO, WILFREDO D. AMISTOSO, RUFINO D. AMISTOSO, VICENTE D. AMISTOSO, MAXIMO D. AMISTOSO, AND ZENAIDA D. AMISTOSO, PETITIONERS, V. ELMER T. VALLECER, REPRESENTED BY EDGAR VALLECER, RESPONDENT