So we're getting down to the wire here and finally sending out our invitations which I'm so excited about. However, an issue as come up. For many of FIs friends, they have significant others - however we either do not them (as their new) or we don't know their last names. I asked my FI to find out - but he said that'd be weird and just put 'and guest' on them. Since some of the couples have been together for years, I can't do that. So here's my questions/dilemma. What do I do as I can't get their information directly.
Do I put: John Doe & Guest
Do I put: John Doe & Jane
or go informal and put: John & Jane