College Graduation Facebook Invitation Etiquette - How do we decline and is a gift necessary?

[HappyChip]

This does all sound a bit much.

I take it your family are all of the same mind about this -- i.e. none of you particularly wants to go to this thing, let alone shell out yet more money; you're all a bit fed up of the constant gatherings, etc?

I see no reason whatsoever for money or other gifts to be given for a graduation for someone over the age of 21, particularly for some qualification gained from an online school. Perhaps I'm doing your cousin an injustice -- is it a proper Bachelor of Sciences degree?

I think it would be fine for just a card to be sent. I suppose she should really get 3 cards from each "unit", unless your parents wrote one on behalf of the whole family. You do need to reply to the invitation to the gathering, but a polite note on the card(s) regretting you will all be unable to be present would be okay.