On some occasions, you will be prompted during the add card process to do extra authentication via a 3-D secure authentication process.5. Why am I receiving an error when completing a transaction with my debit or credit card? Please make sure your card hasn't expired and all details are entered correctly. If the issue persists, you can contact your bank to learn more or contact us here.6. I received a verification code while using my debit or credit card. Where do I get this code from?

We can't guarantee that all requests will be approved.Do I need to pay any fee to request a limit increase? No, there's no fee for requesting a limit increase. This is a complimentary service provided to enhance your experience with OKX.Can I request another limit increase if my first request is denied? Yes, if your initial request is denied, you may submit a new request with additional or updated information for reconsideration. No decision is final.

This code is generated by the issuing bank and is part of the 3-D secure authentication process, which helps to keep your card secure. You can enter the code you received from your bank to complete the transaction.6. My card transaction was declined, but I still see money deducted. When will I get my refund? For declined transactions, your bank may place a temporary hold on the amount when the payment attempt is made.

With OKX Rebate Card, you can get trading fees rebated back on our products that are available in your country and permitted by local regulations. (Only applicable to countries where Rebate Card is available)How does it work? Each rebate card has its face value and valid usage period. Once rebate card is granted to your account (Rewards Center > My Rewards), your corresponding daily trading fees (00:00 to 23:59 UTC+8) will be distributed to your Funding Account in USDT within the next day.

Be cautious when an individual requests upfront payment through unconventional methods, such as wire transfers, gift cards, or cryptocurrencies. Some scammers will alert you that you've won a prize, but you'll be required to pay an upfront fee in order to receive the prize. Before making any payment, ensure you understand the nature of the transaction and deal only with trusted entities.

Note that you'll need at least 1 payment method to receive funds from other merchants.What should I do if my bank card is frozen? Usually, this issue is related to your bank's actions or regulations. To solve it, contact the bank that issues your card and provide any relevant info.How do I identify phishing during P2P trading? When you use P2P trading, you're always dealing with other OKX merchants. While we're doing our best to verify them, sometimes you may encounter malicious people.

Scammers may use Alipay to send you a “Please pay on my behalf” request and provide a screenshot as proof. If you don’t notice the trick, you could be scammed. If you encounter this behavior, please don't proceed with the payment and kindly submit an appeal immediately.

If you're not receiving codes, try these solutions: Clear your browser or mobile app cache, then request a new code. Request a code on different OKX platforms: desktop browser, desktop app, mobile browser, or mobile app. If you can't log in, switch to other alternatives, see the steps below to know how it's done. Note: SMS security codes are only sent through standard mobile carriers.

Google is not the issuer of the OKX Debit Card ("Card") and bears no responsibility for Card transactions or disputes. Token Provisioning & Removal Google creates a virtual card number (“token”) when you add the Card. We may refuse, suspend, or delete a token if we suspect fraud, you breach the Cardholder Agreement, or where required by law or card-scheme rules. User Responsibility Keep your Android device, screen-lock, and Google Account secure. Lost, stolen, or compromised device?

Apple is not the card issuer and is not responsible for the OKX Debit Card ("Card"), underlying account, or any transaction disputes. Tokenised Card When you add the Card to Apple Pay, Apple substitutes a Device Account Number (“token”) for your actual Card number. We may decline, suspend, or delete that token at any time—for example, if we suspect fraud or if your Card account is closed.

For the best experience, please add your card directly through the Apple Wallet app. Once added, you can choose Apple Pay as your payment method on our app to buy crypto with that card.

Other cards aren't supported at this time.How do I buy crypto with Google Pay? For the best experience, please add your card directly through the Google Wallet app.

Since two different polynomials with D degree will share at most D points, an example polynomial pair with a valid polynomial (which satisfies the above constraints) and a fake polynomial with D degree (which does not satisfy the above constraints) will share at most D points. That means a fake polynomial has a chance of to pass a random sampling inspection. If we do the sampling inspection n times, the chance will decrease to .

They then distribute this counterfeit URL to the mass audience via SMS, email, and various social media platforms with the intention of luring users into clicking on the link, through which the attackers defraud users of their bank account information, credit card details, passwords, and other personal data, ultimately gaining unauthorized access to users' assets. Phishing attacks can sometimes be very difficult to distinguish.

The photos of your ID should also show all corners of the ID card or document. Usually, you'll be required to upload both the photo side and the back side of your ID, as shown in the examples below. Photo side of ID Back side of IDWhat if there's no back side to my ID? Certain identity cards or documents don't have back sides, such as passports. During a verification process, you can just upload the photo side or photo page if required.