It does take quite a bit of gall, but is it any worse than an engaged couple who sign up for a bridal registry (is that what it's called?) at a particular department store?

Isn't that nothing more than an outright solicitation for a particular gift as well?

Of course, at least in those cases though, you're usually invited to a wedding at least.

But still.....

Now, what would I do in this case?

Well, if I liked the anniversary couple and they meant something to me, I would overlook the daughter's faux pas and make a suitable contribution of maybe $25 or $50 - the amount I might normally spend on a gift for this type of occasion, party or not.

I wouldn't consider it extortion since I don't necessarily think that there has to be a party to justify the giving of a gift.

I might even think to myself how nice it was for the daughter to be trying to making her parents 25th anniversary so special and memorable, and I might even have been insulted to some degreee if I hadn't been asked to contribute or reminded that this anniversary was a special one.

But.....if I didn't like the daughter or the celebrants, then fuck 'em all. I wouldn't send a dime.