You've picked out your wedding invitations, you've finalized your guest list, and now it's time to think about addressing your envelopes. I provide calligraphy and envelope printing for my invitation clients, but before they send me their lists, I ask them to double-check every name and address to make sure they are correctly formatted.
There are all kinds of rules when it comes to the proper way to address an envelope for a formal invitation, and they vary based a guest's marital status, title, or living situation. There are also rules about how to format the addresses themselves to give your envelope the formality deserving of a wedding invitation. To avoid offending your guests, and to help clarify who is being invited to your wedding, make sure you adhere to the guidelines below. I've included two parts for your reference: first, a list of address formatting tips, and second, a list of proper etiquette for addressing your guests.
Note: these rules apply mainly to formal invitations, but you can apply them to your Save the Dates if you prefer to convey a more formal tone from the start.