Too busy to go to the PhilHealth office? Learn how to make an authorization letter so your representative can transact with PhilHealth on your behalf.This letter authorizes that person to make decisions regarding your finances, legal concerns, and medical care on your behalf. I, Princess Natalie Rubianes, am writing this letter to authorize Maria Teresa Castañeda to act on my behalf regarding my PhilHealth-related transactions. Due to numerous requests for a sample request letter that may be used for PhilHealth transactions, we have devised this template for request. Authorization Letter from the member (original) and 2 Valid signature and photo bearing. I am Arturo Dela Cruz, a resident of West Brooke Subdivision, Pasig City. My behalf regarding my PhilHealth-related transactions. Maria Teresa Castañeda is my mother,. Los Angeles law firm.