No. Your reply envelopes should have only the address of the person or couple to whom the responses are to be mailed. You should not write your guests’ return addresses on them. the post office will definitely deliver mail without a return address.Click to see full answer. Also, how do you address an RSVP return envelope?The return address usually goes on the back flap of the envelope. Also, the return address used should be that of the person(s) whom you’ve designated to receive response cards, be it your parents or you (traditionally, whoever is hosting the wedding handles response cards).Subsequently, question is, do I have to put a return address on wedding invitations? There is no need for a return address on the inner envelope. Formally, the return address should be handwritten, but it is acceptable today for this to be printed, to use a mailing label, or a return address stamp. Traditional, modern, casual–the choice is yours. Also question is, do envelopes need return address? The return address is not required on postal mail. However, lack of a return address prevents the postal service from being able to return the item if it proves undeliverable; such as from damage, postage due, or invalid destination. Such mail may otherwise become dead letter mail.How do I send RSVP back? Mailed invitation with RSVP card Fill in the card and mail it back in the enclosed envelope before the date listed, or preferably as soon as you receive it. Check to see if the event allows a plus one. If it does, double check that your date can make it before you RSVP for them.