i got a message saying payment verification 400 dollars something like that from someone . is it spam

I got that message too, don't click any links. It is spam I asked the staff.

Hi everyone,

We’d like to sincerely apologise for the recent issues some of you have experienced.

Our team identified a phishing attempt that targeted a number of users on the platform. As part of our response, we proactively removed suspicious accounts and introduced additional security measures, including password resets, to help protect our users.

Please be cautious with any unexpected emails - especially those asking for payment details or urging you to click links.

Only CGTrader administrators have a checkmark next to their profile name, so always look for that when someone claims to be from our team. The admin checkmark is also visible in the message screen, helping you verify whether you're talking to a real CGTrader representative.

You can see an example of a verified CGTrader admin profile here:
https://www.cgtrader.com/designers/JuliusCGTrader

And you can read more on how to identify real CGTrader employees here:
https://help.cgtrader.com/hc/en-us/articles/4413046247441-How-can-I-know-if-I-m-contacted-by-actual-CGTrader-employees

Thanks for your understanding, and feel free to reach out to our support team if you have any questions or concerns.

Best,
CGTrader Team

Yes me too. I don't sell any of my models over 30 bucks so it was more obvious to me lol.