a note from the couple to thank you would be correct but they may have only just received it following a honeymoon and maybe even a move into a new home. Try asking your good friends whether they have received it yet and that may jog a card to say thanks
Found out today, can't take it in
Well, that was a farce.........


, fortunately my girls are much better. Two sent hand made cards and the youngest had a group photograph printed on a card to send to some and a picture of the bride and groom for those who were not at the reception. 
. I also sleep-walked later, tried to get into the wardrobe instead of the bathroom. Ex-DH must have wondered what he was taking on!

