Both DH and my offices got us group gifts which is super nice. My office got me a picnic basket with a hodge podge of gift cards and snacks and DH's office went in together for a Target gift card. I'm not sure how to do thank you cards. Do I send a thank you card to every single person in the office who contributed. I'm not even 100% sure who contributed to the gifts. Or do we just do one thank you and hang it up on a bulletin board somewhere or no thank you at all?