My husband suggested I refer to WW on this matter. Gearing up to write our thank you cards, we noticed 6 guests did not even give us a card, but were in attendance. One of the guests I never saw throughout the night, but my husband did. At 1st we felt that it was possible someone could have stolen a few cards, because our card box filled up and some of the cards were sticking out at the end of the night. Also, we entrusted our locked card box with my husband's brother because we left for our honeymoon the very next morning, no time to go through cards and gifts. One of our coupled guests gave us a card/no money, we know what to write in that thank you card. We were happy they came, and at least gave us a card with well wishes. But to come with no card at all? Another guest said they forgot their card but would send theirs in the mail, when we got home from our honeymoon, sure enough their card was in our mailbox. I would think most people who forgot their gift or card cont.