The purpose of this document is to provide a concise list of principles and guidelines for facilitating and fostering human trust in Air Traffic Management (ATM) systems. It concerns controller trust with computer-assistance tools and other forms of automation support, which are expected to be major components of future ATM systems. This document, the third one developed within the Solutions for Human-Automation Partnerships in European ATM (SHAPE)' Project, is a supplementary note to the first main deliverable which provides a detailed review of the literature on trust (see EATMP, 2003a). It is intended as a support document in practical design issues.