My friend has a sister who got pregnant with her 5th child. My friend who is married for 10 years can't bear a child. They agreed that her sister will give her child to my friend because she reasoned she no longer want to make alaga na since her 4th child is barely 2 years old and that they are having financial problems. My friend wanted to file a petition for adoption since she can afford it naman but her sister said to just simulate the birth so my friend can save the money for her to pay for her sister's delivery. So they did it. My friend paid for everything including maternity dresses and pre-natal check ups, and took the child home after delivery. The problem now is her sister is telling everyone, friends and relatives, about how the child is not my friend's and referring to my friend as just mere "yaya" of her child. By the way, my friend wasn't even there when they simulate the birth certificate. They just made her sign it up. Does she have to file cancellation of birth certificate first before she can file for petition for adoption? Thank you.