FORM OF PAYMENT
1. LOAN OF MONEY—if the thing loaned is money, payment must be made in the currency stipulated, if it is possible to deliver such currency; otherwise it is payable in the currency which is legal tender in the Philippines and in case of extraordinary inflation or deflation, the basis of payment shall be the value of the currency at the time of creation of the obligation
a. Coins 25 cents and below: up to P100 is legal tender
b. Coins above 25 centavos: up to P1000 is legal tender (according to BSP Circular of 2007 Series 6)
2. LOAN OF FUNGIBLE THINGS—if what was loaned is a fungible thing other than money, the borrower is under the obligation to pay the lender another thing of the same kind, quality, and quantity.