original deed of sale might be a bit tricky to send out.. only because you dont know whose hands it will go to and whoever possesses the orig deed of sale basically can sell your property.. if you trust the people who will handle it, you can submit it as you like.. but if you are unsure.. you can go to the Register of Deeds in quezon city and bring your orig deed of sale, show it to them and order a certified copy from them. you should be able to get this in 3 working days for a minimal fee...
