An acquaintance of mine sends out those letters. She was complaining the other day "omg! I'm so busy! I have to do all these letters, that's over 150 letters that I have to get into Christmas cards and get them addressed and stamped and mailed. I have a feeling some people are going to be shocked. They don't even know that I remarried!"
"You've spent a lot of time lately complaining about how busy you are with all your Christmas preparations. Has it occurred at all to you that the people who don't even know you got married six months ago really don't give a shit? If if was me, I'd save my money on the greeting card, envelope, postage, and more importantly, I'd save time by not contacting former 'friends' who don't care enough to even know that I got married this year. If they couldn't be bothered enough to know something that important, I don't know why you feel so compelled to spend your precious time contacting them."
<Dirty looks.>