|Date added to the store||12th March, 2014|
|Date removed from the store||24th July, 2014|
|Creator's website||CPHax2 YouTube channel|
Postcard Sender was a verified Add-In, which could send any postcard to any penguin chosen by the user. The player that the postcard was sent to, could be specified either by name or ID.
Sending unavailable postcards has been patched after April 30th 2014, when a hacker known as Lolnok (@LolnokCP) used packets to send thousands of offensive postcards to random people. After that, if you tried to send a not-featured postcard, you would be removed from the server (not banned though).