I disagree. I volunteer at graduation every year and we ALWAYS have people showing up with their announcements in hand thinking they've been invited. Every year they tell the kids to make sure to clarify this to their friends and relatives, but I know I turn away at least 20 from my door alone. (we have about 6 doors)
I remember years ago I was working at graduation. It was at my old school, where we had graduation outside in the gorgeous stadium, and it was always a wonderful event . . . unless it rained, and then it was the most miserable of events, shoved last-minute into the small, stuffy gym. This particular year it had rained, and -- at the last minute -- the graduates had each been given a small number of tickets. A man came to the door without a ticket, and he insisted that parents didn't need tickets. He said that his son had come to his house that afternoon, accepted a graduation gift of money, and TOLD HIS FATHER that he could get into graduation without a ticket just by saying he was a parent. The man looked like he'd been punched in the face when he heard his son had misled him.
You send out announcements before actually graduating? That seems strange to me, like sending out a wedding announcement before the actual wedding. If they aren't an invitation then shouldn't they be sent out once the person has actually graduated?
Who am I to say though I had never even heard of a graduation announcement before seeing it here
Technically, you're right -- just as some people who have a small wedding send out INVITATIONS to the people whom they want to invite, and then send out ANNOUNCEMENTS to the people whom they want to inform.
But in my neck of the woods, the school sells ANNOUNCEMENTS, and families treat them like INVITATIONS, sending them several weeks ahead of time. (And you can walk right into graduation with or without an invitations -- space is not a problem at our venue.)
It's always been common for people to tuck an invitation to a family party, open house, brunch, whatever into the graduation announcement, but lately -- lately as in the last couple years -- I've seen more and more people buying nicer engraved invitations (often with photographs) and combining the graduation /party information. Personally, I think I'll MAKE my daughters' invitations. I should probably start now.