Being unclear on if a “plus one” is invited.
(A good example of being clear on whom is invited) Few things are worse for the wedding guest than not knowing if it is OK to bring a date. Some couples intentionally keep their wedding invitations vague to try to nudge guests to only bring a date in obvious scenarios (the guest is married or engaged). If you are close enough to the guest to invite them to your wedding, then you are probably close enough to allow them to bring a date. If you really don’t want them to bring a date, at least be clear about that on the invite. And a message for guests… weddings are expensive. Keep this in mind when answering the invitation. If you were covering the cost, would you invite a date? Ask yourself this question before answering. If it is a serious or semi-serious relationship, invite your date. If not, save the couple some money and fly solo. You’ll probably have more fun anyway.