Well, as many of you are in doubt what are the exact and right proofs that we need to see when you are reporting a scammer, i decided to write it down so there wont be doubts anymore and everyone will have to follow this procedure as this is the 100% one and you wont make mistakes with it.
1) You will have to make sure that there isnt any admin who can help you and watch your trade.
2) If there isnt any admin, you will have to take a screenshot (F8) of the deal that you both made. Remember, you will have to take screenshot of his approval aswell, we need to see everything.
3) Next step is to open that /dl so you can see ids of the cars and all the information. Or simply, just take a screenshot of your cars and his cars before you start trading by doing /cars id.
4) Find a good place to trade on and make sure that your /cgoto is closed while you trade, so no one else can tp to you and get those cars instead.
5) Take a photo when you sell your cars.
6) In case if he didnt sell his cars and he left the game, just take a photo of his cars and take a photo of your cars once again that are owned by him now. Aswell, take a photo that he left the server if he left it and runned away. You are free to report him for scamming and we are going to deal with him.