So I've heard of people adding their uninvited children to the reply card or replacing a spouse/date with another person, but I'd never heard of someone substituting in another couple on the reply card. Until now.
Some background. My mom had us invite her three cousins and their spouses, but we decided not to invite their grown children (late 20s, early 30s). One of her cousins lives OOT and is in failing health, so we didn't really expect her and her husband to attend. Well, today we got their reply card. They checked "accept" and then wrote in "in lieu of Mr. and Mrs. John Doe, Ms. Suzy Doe and Mr. Mike Smith will attend." So they are apparently sending their daughter and her boyfriend in their place.
My mom wants to just let it slide and have the daughter and bf come, since she doesn't want to call up her sick cousin and uninvite the daughter. I just find it very odd to RSVP with a substitute couple. I'm not even sure why the daughter wants to come since she has not seen most of the relatives at the wedding since she was a child.
Oh, well. Just thought I would share an amusing/strange incident. You never know what kinds of crazy things people will do!