Seriously? I received maybe 3 cards of weeding and more thant 30 for my birdthay. I kept them all too. We can save tree when there's purpose like printing for reading an email, for invoice, etc. because they don't give or add any value, but my handmade card for my weeding, if you throw it is disrespectful, because If I had invite you, it's that I take care of you. (BTW I made only 15 invitations.)