* Yes, the name and address on a wedding invitation should be centered on the envelope and your return address on the upper left.
When sending a wedding invitation the response card should go into the response envelope and you should address it back to you on the front of the response envelope with a stamp on the envelope.
Wedding invitation envelopes that are inserted inside the mailing envelope are usually left blank. The outer envelope for the wedding invitation usually has the addressee and the return address of the person that will be contacted for all RSVP's.
You generally send a wedding gift to the bride's home and the address where gifts are to be sent is the return address on the envelope re the wedding invitation.
Wedding invitation envelopes that are inserted inside the mailing envelope are usually left blank. The outer envelope for the wedding invitation usually has the addressee and the return address of the person that will be contacted for all RSVP's.
== == Yes you should just in case the guest you are asking has moved and there is no known address. You should be doing all the work when sending out your Invitations so the return address should go on along WITH A STAMP!
The Guests
When you receive the wedding invitation there should be a small card in a small envelope with the address of the bride or groom's parents name or, in some cases either the bride to be or the groom to be. In the small card you tick off if you are coming and if you are bringing your girlfriend; wife or a guest. The envelope should have a stamp already on it and you just have to mail it out.
* The Wedding Invitation (large card announcing the couples up coming wedding) comes first and the RSVP (replies from guests .. the card and self-address and stamped envelope are tucked inside the Wedding Invitation and then put into the large envelope and mailed off.
This is more of a matter of preference than protocol. Some of the address labels in gold are quite tasteful. The color of the envelope might also be a variable. If the invitation envelope is a cream, ivory, or white it would look stunning.
I put .96 cents on a wedding invitation i sent to France. But a wedding envelope is bigger than a regular letter envelope.
All Invitation vendors have RSVP cards that go along with your Wedding Invitations. You will send it out to all your guests with a self addressed envelope. That way you are sure to get your response's from your guests.
* The address and date go on the invitation only. The little card should only have '_______________and ______ guest. When answered it should appear as Mr & Mrs. John Doe will be attending (and if single) Mr. (or Ms.) John/Jane Doe and guest will be attending. If a guest is coming alone they will only put their own name and no other. On the envelope that goes with this card (to be returned to you) your address should be on it and it should have a stamp placed on the envelope.