After viewing multiple threads regarding this, i think theres a quite easy solution on Valves end on how to fix it. I'm posting this here first because i was courious on how you guys take this idea. So from what i could tell, a carder is somebody that gets a credit card by illegal means and then uses that card to purchase thousands of keys from the community market or valve. That user then sells the keys for cheeper than normal and it causes a lot of trouble for the person that purchased the keys. A way i figured that could be done to fix this is another level of verification when purchasing items. I'm not sure how long the person that stole the credit card has access to the card after he stole it, but i assume it really cant be to long. So if you go to valve to purchase keys it should have some sort of phone verification or possibly a 4 digit pin that the user created. Its like creating a G-Mail account where you need to input a phone number sometimes in order to create an account. Another idea can be a waite peroid from when you linked the credit card to your steam account to when you can start purchasing items with the card. Just like that peroid of time you have to waite for the Steam Guard to be activated. I'm not sure if im grasping how carders work correctly, but they, i assume link the card to a steam account and then go on purchasing the keys and such. All in all, its just a matter of verification when purchasing items, it may take people a few minutes longer to use cash to make trades, but it would end up being a lot safer i think. Again, i may not be 100% clear on how the carder's operate and work, so if i have any miss information, i would hope somebody could clear it up for me. I pitched this to you and i'm hoping to also pitch this to valve. These are only my speculations on how the problem may be solved. I would also enjoy hearing others idea on this problem and how to have a fix for it. I'm sorry if im not aloud to post topics like this at SR, i didint see anything aginst it in the rules, if so please remove this topic. Thank you for taking your time to read this.