The document contains two sample authorization letters for PhilHealth. 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. I'm ______, and I live in . Since______, I have been a member of the Philippine Health Insurance Corporation. I, Princess Natalie Rubianes, am writing this letter to authorize Maria Teresa Castañeda to act on my behalf regarding my PhilHealth-related transactions. Authorization Letter from the member (original) and 2 Valid signature and photo bearing. Download, print and complete the authorization form. The authorization form must be signed and dated. To Whom It May Concern,.