Credit card verification allows you to remove market restrictions associated with using a new credit card on Steam.
After using a new credit card on Steam, please go to the Credit Card Verification page and choose the card you wish to verify. Two small pending authorizations will be sent to your bank account. These authorizations may take time to appear on your statement. Once they appear, you may enter the exact unconverted amounts into the fields on the verification page. Please note that you only have three attempts.
If you fail to verify the card after three attempts, you will have to wait the normal 3 day period to use the Market. Steam Support cannot override this.
The authorizations will be removed from your credit card statement in 5-10 business days, whether you verified them or not.
The verification authorizations are sent to your bank in the currency that is used in the Steam Store. If the bank converts these to your local currency, you must contact them to request the original amount before any fees or conversions. The phone number will be on the back of the card.
Self verification does not currently support virtual credit cards. You must wait 3 days to use the Market each time you use a virtual card on Steam.
Don’t see your question? Check out the Community Market Group with user Discussions and official Announcements.
Steam Support cannot modify trading or Steam Community Marketplace restrictions, regardless of the circumstances under which your account became restricted.