I saw below someone had posted a question about writing a thank you note for a guest bringing a friend who was not their significant other, and the answer was to go by the signature on the card they gave.
But what if they didn't give a card or anything? My husband's friend wanted to bring a friend with him to the wedding because he didn't want to come alone, which was no big deal. However, the friend doesn't even live in the same state as the plus-one, so I'm wondering how to go about the thank you card. A little background, we had a wedding that was destination for pretty much everyone except for us (bc we just moved her a year ago), so we wanted to send thank you notes to everyone for doing us the honor of coming.
I'm guessing I should try to find the address of the plus-one friend to send a thank you note there as well?