Every card has a signature link — one URL that lets anyone add a message to the card. Signers don't need a PortaPro account.
You have two ways to share it.
Option A — Copy and paste
[Screenshot: Card detail header with the Copy signature link button flashing green]
Option B — Send to team (built-in broadcast)
Each teammate you selected gets:
The card's recipient is automatically hidden from the picker — you can't accidentally invite them to sign their own card.
