Someone shared a card with you? Here's how to sign.
Your message appears immediately on the board with everyone else's.
[Screenshot: Sign card page with the composer at the top and the message board below]
Editing or deleting your message
GIFs and stickers
If the card is already sent
You'll see a message that says the card has been delivered — signing is closed. Reach out to whoever created the card if you need to send something separately.