|< ID Card 39||All ID Cards||ID Card 41 >|
ID Card #40 is a collectible item in Dead Island, and can be found in the Moresby map of Act II. It is part of the My collectibles, let me show you them! challenge, and the Gotta find'em all and Nearly there achievements.
It's on a mattress in the Rooftop area within the quarantine zone. Not far east of the 1st speaker for the The Third Head of Cerberus quest. Near the Warehouse safehouse.
Can be seen on the following map: