G.R. No. 123560 - Spouses Yu vs. Pan American World Airways, Inc.

Petitioners, spouses Inocencio H. Gonzales and Rosario Esquivel Gonzales, obtained a housing loan of ₱80,000.00 from the Government Service Insurance System (GSIS) on three separate dates in 1968.
The loan was to be repaid over fifteen years with a bifurcated interest schedule: 6% per annum on the first ₱30,000.00 and 9% per annum on the balance.
As collateral, GSIS accepted four parcels of real property: two residential lots in Quezon City and two agricultural lands in Jaen, Nueva Ecija, with the agricultural lots measuring approximately 15.7880 hectares and 9.4602 hectares, respectively.

The petitioners paid several monthly installments of ₱814.38 until their compulsory retirement from government service in 1973, leaving an increasing unpaid balance.
By May 31, 1978, the outstanding obligation had ballooned to ₱135,884.87 due to accrued interests and arrearages.
On October 21, 1972, pursuant to Presidential Decree No. 27 (the Tenants’ Emancipation Act), the agricultural lands were subdivided and awarded to tenant-farmers, altering the original collateral arrangement.
In May 1979, the Land Bank of the Philippines initiated a remittance for one of the agricultural lands, which was appraised at ₱117,005.00, breaking down the payment into 20% cash and 80% Land Bank bonds.

GSIS refused to credit the Land Bank bonds at their full face value; instead, it accepted only a portion at par value (₱16,400.00) and imposed a discount (18% per annum) on the balance, thus valuing the bonds at ₱41,775.00 instead of their face value of ₱93,500.00.
Petitioners, under protest, accepted the GSIS condition on July 30, 1979, but later sought reconsideration, including an appeal to the Office of the President and an offer to pay the remaining balance in cash, on the condition that the bonds be accepted at par value.
GSIS maintained its stance, citing its policy of crediting payments by discounting bonds to yield an effective rate of 18% per annum to maturity.
The petitioners eventually filed the present Mandamus suit on November 28, 1979, seeking an order compelling GSIS to accept the Land Bank bonds at their face or par value without any discount.

The central legal issue derives from Section 80 of Republic Act No. 3844, as amended by Presidential Decree No. 251, which governs the settlement modes for the acquisition of farm lots.
According to the said provision, when lands subject to an existing lien or encumbrance are acquired by the Land Bank under the land reform program, the owner is entitled to receive the net value of the land (the appraised value minus the outstanding loan balance); the remaining balance due to a government lending institution is to be settled by the Land Bank in bonds or securities.
The petitioners argued that under this statute, the bonds issued should be credited at their face value, aligning with the intention of providing full compensatory value to landowners and facilitating the land transfer process to tenant-farmers.

Whether under Section 80 of Republic Act No. 3844, as amended by Presidential Decree No. 251, the GSIS may be compelled to accept Land Bank bonds at their original face or par value instead of a discounted value.
Whether the GSIS policy of discounting Land Bank bonds, thereby reducing their value credited toward the outstanding housing loan, contravenes the statutory scheme of land reform designed to protect both tenant-farmers and landowners.
Whether the acceptance of bonds at a discounted rate undermines the principle of non-impairment of contracts and the indivisibility of the mortgage obligation that secured the loan.