What is proper etiquette for receiving a college graduation announcement after the event?

When you receive a college graduation announcement after the event, it's considerate to acknowledge it with a congratulatory message, either through a card, text, or email. If you know the graduate well, you might also consider giving a small gift or gift card as a token of your support. It's important to express your pride and happiness for their achievement, even if the event has already passed. Remember to be sincere and personal in your communication.