How do I send an item to another player?

You can get a special item called Homing Pigeon from packs.
Find it in Items and tap it to use.
You can search to find a corps ally or any player by typing their nickname.
You can also write something here to the recipient.
Tap Unknown Item icon to attach the item you want to send.
When you finish the steps above, Send button turns purple and you can send the item now!