I need some advice on addressing my STDs. I have some guests that are single, but will be invited with a guest. For the formal invitation, I know i would put their name on the outside envelope, and in the inside I would have their name and "and guest." But how do I handle this for STDs? There is only one envelope. Do I just put Ms. Jane Doe? Or do I put Ms. Jane Doe and Guest? I dont like having "and guest" on the outside envelope, but how else do you indicate that?