When addressing invitations I was very careful to write out exactly who was invited to our wedding. My Fiance and I made the rule that unless you are in a serious relationship (engaged, married, living together, been dating for more than 1 yr) then plus ones are not invited to the wedding. Those that I knew were in serious relationships I added their significant other's name to their invite, if I didn't know their name I wrote "so and so and guest."
We are however running into the issue that people are just assuming that they get a plus one with their invite (my friends, my cousin, MY BRIDESMAID). What's a nice way to tell people "sorry but your plus one can't come?" We just don't want a bunch of random people at our wedding that we've never met before. This just adds the potential for drama if that guest gets drunk or something else happens and we just don't want that hassle. At least one of my friends was nice enough to ask if her invite included a plus one, to which I told her no.
Any suggestions would help! And am I way out of line to think it's absurd that people just assume they get a plus one unless their invitation clearly states it?