Letter of Authority for Passport Pickup. Can't collect your passport in person?Learn how to draft a letter of authorization, allowing someone else to pick it up for you. The applicant's original passport needs to be available when collecting the permit as the VFS representative will endorse the permit inside the passport if. How do I fill this out? Letter of Authorization(LOA) Please print the LOA and sign it with blue ink. This letter is an authorization in which you authorize us to process your passport. If USCIS approves your Form N400, Application for Naturalization, we will schedule you to take the Oath of Allegiance at a naturalization ceremony.