I'm often asked what the proper etiquette is for addressing wedding invitations, depending on the formality of the event. Firstly, remember that your invitations set the tone for what guests can expect at your coming wedding. The invitation guides them as to the formality, and even helps many guests choose their attire for the night. For instance, an invitation to an daytime, backyard event may look very different than an invite to an evening dinner reception at a formal restaurant or hotel. Your invitation does not need to leave guests questioning what is to come, so be sure to use clear language if black tie dress is optional or requested, if you are solely having a dessert reception, etc.
For a formal wedding, consider sticking to white or ivory paper (whichever matches the bride's dress), and traditional black ink. You can play around with color, but keep the design simple. Stripes, seashells, or polka dots do not say "formal" or "black tie".
Address labels are, by most standards, not appropriate for a wedding invitation. Calligraphy is beautiful and elegant for a formal wedding, and printing directly onto the envelope is always a good choice.
Timing is important when sending invitations, especially when some guests are traveling to be there for the wedding. Guests should receive your invitation about eight weeks from the wedding day, but consider sending a Save the Date six to eight months out if you have many out of town guests, or if you are having a destination wedding.
Don't forget to list an RSVP date clearly on your invitations. This is typically 2-3 weeks from the wedding date, but check with your caterer or venue to be sure you'll have enough time to turn in your final headcount. It is perfectly appropriate to call any guests who do not RSVP to politely ask if they'll be attending. Do this about two weeks from the wedding date.
Include information/direction cards if your ceremony and reception are not in the same place, or if a large amount of guests don't know their way around your city. These days, it's also appropriate to include the address to your wedding website, which can offer directions, maps, and hotel options.
Many wedding invitations require additional postage, so be sure to visit the post office before mailing them all to be sure you won't end up with a mailbox full of returned invites! Always self-address and affix postage to the response card envelope.
Unsure how to word your invitations? Check with Wedding Paper Divas on sample wording.