Etiquette On Sending Sympathy Cards Is It Proper Etiquette To Send People Thank You Cards After They Send You A Sympathy Card?

Is it proper etiquette to send people thank you cards after they send you a sympathy card? - etiquette on sending sympathy cards

My father died unexpectedly in early September and I wonder whether the label applied to people who come to a condolence card to send money, flowers or visit a card of thanks from more? Or send a postcard to those who know sent money May, flowers, food, or participate in the memory (not all addresses of those present.) Any help would be appreciated. Thank you!