Face to face trade:
In the video/screenshots, include the customer's name, display the total gold in your backpack and the offer before the trade, show the total gold in your backpack after both parties accept the trade, and capture a system message confirming the trade has been completed.
Note: Gamer Choice strongly advises the submission of video evidence. Please be aware that using screenshots is at your own risk, particularly in cases where a customer disputes the receipt of the product or service.