Generally, you only put who you are inviting on a wedding invitation, so I feel putting something to the effect of "Adults only" or "No children please" is tacky.  If you ask this question over on the Etiquette board, that's pretty much what they'll tell you. Here's what I did to make sure that people knew exactly who was invited to our wedding: The envelope was specifically addressed to the people who were invited.  If you have an inner envelope, you only write the names of the people invited on that envelope as well. I personalized my RSVP cards since I did them on my computer.  Each RSVP had the names listed of people invited and they were able to check their meal choice or "Declines with regrets".  If you are not able to personalize each RSVP card, there are other ways to indicate who is invited.  You can have a line that says "____ seats have been reserved in your name".  Or, on the line where they write the number of people attending, you can fill it in so it says __/2 attending so they know only two are invited.  If you're truly worried, I would talk to the families.  My best friend has two daughters that are really close to my H, but she completely understood that by inviting her girls, that meant we had 5 other friends whose kids we'd have to invite and, for us, it was a budget thing.  We would have loved to invite them all because I'm all for kids at a wedding.  Don't assume that people will want to be there without their kids.  While it is rude of them to make the assumption that their kids are invited, some families see weddings as a time that they family all gets to go somewhere together so some may have a hard time with your wishes.  Again, it's rude of them to push the issue, but just don't make the assumption that all couples view weddings as "a night away from the kids", especially if it involves seeing other family members that they rarely get to see.
Posted by hcorrigan34