Formal Invitation Writing Detailed Format with Worked Examples for Different Occasions On this page Which Occasions Take a Formal Invitation? Anatomy of a Formal Invitation Rules Example 1 — Wedding Invitation Example 2 — School Annual Function Example 3 — Shop Inauguration Example 4 — Retirement Farewell Example 5 — Chief Guest Invitation (Letter Form) Quick Revision Checklist 1. Which Occasions Take a Formal Invitation? Use the formal card format for any occasion that is significant, involves a wide circle of guests beyond close friends, or carries an official character: Weddings, engagements, wedding receptions School or college functions — annual day, sports day, prize distribution Inaugurations — of a shop, office, exhibition, building Official or corporate events — conferences, seminars, product launches Farewells and retirement functions Inviting a chief guest or VIP to preside over an event Birthdays, casual get-togethers, and invitations to close friends or family ...