The TROY M402/M404/M428 locking paper tray prevents unauthorized access to your valuable paper stock. These locking trays have been designed and custom engineered to fit each security printer, helping to prevent paper pilferage and theft. Secure paper trays can be used to regulate chain of custody, to protect from accidental interference while handling important documents, as well as controlling the amount of potential paper wasted. Safeguard High-Value Paper Stock Secure locking trays provide only authorized personnel with access to high-value paper stock. Prevent Paper Theft Paper tray shielding helps prevent paper removal from the back of your printer. Minimize Risk Corruption, theft, fraud, and forgery are potential and costly risks that can occur if a valuable document, or high value paper stock ends up in the wrong hands.