Wedding & Party Invitations on Instagram: "10 Essential Tips for Addressing Wedding Invitation Envelopes 1. Formal Titles: Use formal titles like 'Mr.,' 'Mrs.,' 'Dr.,' etc., to honor your guests and the formal nature of the event. 2. Full Names: Always include the full names of your guests, avoiding nicknames, to maintain formality. 3. Married Couples: Address married couples as ‘Mr. and Mrs. [Last Name]’. For those with different last names, list both names fully. 4. Unmarried Couples Living To