The following cases are landmark Supreme Court decisions in cases involving oppositions to the issuances of letters testamentary, petitions for letters of administration and contest for letters of administration.
[1]Sagunsin vs. Lindayag, 6 SCRA 874 (G.R. No. L-17759; December 17, 1962)[2]San Luis vs. San Luis, G.R. No. 133743, February 6, 2007
[3]De Arranz vs. Galing (G.R. No. 77047; May 28, 1988)
[4]Tayag vs. Tayag-Gallor, G.R. No. 174680, March 24, 2008
