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, Princess Natalie Rubianes, am writing this letter to authorize Maria Teresa Castañeda to act on my behalf regarding my PhilHealth-related transactions. Forms for Passport Services, Forms for Visa Services, Forms for Citizenship Services, Forms for Civil Registry Services, Travel-related Forms Permission to post po admin. Letter of Authority No. 1 (1972). Clara Agrarian Reform Beneficiaries Integrated Devt. The National Health Insurance, "PhilHealth", is the healthcare provider for Filipino citizens in the Philippines. Pending ERC approval.