We've got a little over two weeks until our RSVPs are due. FI's family is declining in surprising amounts, which is fine -- I completely understand that it's not easy to fly in, potentially take a day off work and drop several hundred dollars on plane tickets and hotel rooms.
However, I've never heard about people not sending a card or even writing a quick note on the back of the RSVP card if they can't be bothered to pay for the stamp/card themselves. This isn't about gifts, because that's a personal choice -- I'm just talking about an acknowledgement through card, Facebook message, e-mail, or smoke signals that says 'Hey congratulations and best wishes on this next chapter in your life. -- from pretty immediate family (Aunts and Uncles) who had FH attend their out of state weddings.
What do you do when you decline an invite?