Abstract: A safe delivery box that attaches to a walk in door with a hanger. A package is delivered by inserting it into the interior volume through a pair of tandem trap doors. The trap doors work together to prevent a package from being removed through the trap doors. While attached to the walk in door an access door is held against the walk in door so that the access door cannot be opened. When the walk in door is opened then the box may be removed from the walk in door and the access door may be opened to remove the delivered package.