I have read in many places on The Knot, and in other etiquette sources, that each person over age 16 or 18 (depending on source) receives their own invitation. I'm curious, in an environmentally conscious era, just how necessary this is for young adults living at home with their parents. In certain cases, it seems like a waste of paper, as many people just toss the invitations later.
Now, I completely understand individual invitations for young adults away at college, or who have moved out for any reason. But, if an 18 year old is living at home, what is the purpose of sending an extra package of paper?
Please, save the comments simply instructing me that "I must" do separate invitations. I'm not actually anywhere near sending invitations yet, I'm just curious about the origin of the etiquette, and if it's something that can adapt with the environmentally aware times. If anyone knows any history of this custom, I'd be very interested!