This document provides information to help non-profit organizations avoid common mistakes and prevent loss of their 501(c)(3) tax-exempt status. It outlines key areas like compliance with state and federal requirements, accountability through financial and governance policies, transparency to the public, and avoiding "danger zones" such as improper lobbying, charity gaming violations, and abuse of non-profit status through actions like excessive executive compensation. Maintaining compliance, accountability, and transparency while steering clear of legal and ethical issues can help safeguard a non-profit's important 501(c)(3) designation.