A "script dupe" refers to the use of third-party software or modified game scripts to exploit the trading mechanic. The goal is to duplicate a vehicle so that both the sender and the receiver end up with the item, effectively "printing" rare cars out of thin air. How the Exploit Generally Functions
Never trusting the client (the player’s computer) to confirm if a trade was successful. Cars Trading Script Dupe
To fix the issue, follow these steps: