Pay attention to a few points that can effectively prevent receiving dirty money and card freezing:

(1) In OTC trading, try to choose large platforms like Binance or some easy-to-use platforms. These platforms have good communication channels and risk control measures with regulatory and law enforcement agencies in mainland China.

(2) Try to choose OTC platforms that support T+1/T+2 withdrawal strategies. Although you cannot withdraw immediately after selling currency, it reduces the risk of being involved in money laundering through OTC transactions. For example, Binance T+1, Huobi Strictly Selected Trading (compared to free trading, T+2 withdrawal).

(3) Avoid using stablecoins like USDT for OTC transactions; try to use mainstream coins like BTC or ETH for OTC trading.

(4) The bank card used for OTC trading should be a separate card that is not commonly used, separated from salary cards, so that even if it is frozen, it will not affect the use of other funds, making it easier to clarify the flow of funds during the investigation.

(5) For OTC trading, it is recommended to use local bank cards, such as city commercial banks and rural commercial banks in various regions. Large and medium-sized joint-stock commercial banks such as Industrial and Agricultural Bank, China Construction Bank, and China Merchants Bank have branches across the country, making it easier for law enforcement agencies to freeze them directly.

(6) Do not frequently trade with fixed merchants, and avoid frequent transactions with fixed users. If the same user purchases more than three times in one day, or buys and then sells a few hours later, it will be very dangerous and raise suspicions of money laundering.

(7) Find reliable OTC merchants for transactions. Try to actively take orders from large merchants and market makers, and make fewer limit orders, avoiding problematic merchants. In reality, as an ordinary user, it is very difficult to distinguish which merchants are trustworthy. For example, many friends who frequently traded with Huobi's Blue Shield service providers have also had their cards frozen.

(8) Reduce the frequency of withdrawals and increase the cash amount.

(9) After OTC trading, do not transfer to your other bank cards to avoid contaminating other funds, which can complicate the investigation. If you urgently need money, you can withdraw cash via ATM or spend online.

(10) Try to choose to cash out during working days. It is best to conduct transactions during normal working hours, such as between 9 AM and 9 PM.

(11) Do not transfer out immediately after receiving payment. After selling USDT for RMB, do not transfer it out immediately; keep it in your account for a while.

If your card is unfortunately frozen, how should we explain to prove that we have not participated in money laundering activities?

(1) Personal transactions involving normal Bitcoin buying and selling, not related to money laundering or other illegal transactions;

(2) You are unaware of any criminal implications regarding the debts received from selling currency.

(3) Cooperate by providing all transaction records, chat records, on-chain transfer records, etc.;

(4) You must be very clear that engaging in digital asset transactions does not violate the law.

In OTC trading, if your withdrawal bank card is frozen due to public security judicial freezing, what materials will the other party require from you to lift the freeze?

Commonly required documents mainly include: complete transaction records, such as bank transaction statements, on-chain transaction records, trading platform order records, WeChat chat records (which should include the content of communication during the transaction), and other evidence that can prove the legality of the assets, including income proof, etc.

So, once you unfortunately receive dirty money and your card is frozen, how should you resolve it?

First, go to your account-opening bank to understand the reason for the card freeze and which authority has the right to freeze the card.

The reasons for card freezing can be summarized into two types: bank risk control and public security freezing:

1. Bank risk control. Factors causing bank risk control may include frequent large transfers recently, centralized inflows and dispersed outflows, rapid entry and exit, frequent nighttime transactions, and no balance left in the account, all of which are classified as transaction anomalies. As a result, the bank's anti-money laundering risk control system is triggered.

2. Public security freezing. Usually occurs when the account has received other illicit funds related to a case, which could be directly received or indirectly flowed. Public security will freeze all associated accounts that have flowed through the illicit transaction to prevent fund transfers and facilitate case investigations.

How to resolve the two reasons for card freezing?

1. For bank risk control freezing:

Take your ID card and bank card to communicate with the bank where you opened your account, and submit relevant transaction reconciliation proof. If there are policies or directives from the public security involved, you will also need to cooperate with the local public security department for an investigation. If the anti-fraud center's monitoring is triggered, you will need to fill out the anti-fraud application form required by the anti-fraud department, and your account will only be unfrozen after passing the review.

2. Dealing with public security judicial freezing:

Observe for 3 days first. Check if the temporary suspension has turned into a formal freeze (extended freeze for six months). If it turns into a formal freeze, go to your account-opening bank immediately, inquire about the name of the public security unit that froze your card, the case number, and the name of the police officer responsible for the case. Then contact the responsible police officer to understand the reason for the card freeze and cooperate with their investigation. Once it is verified that you have not committed any illegal or disciplinary violations, your account will be unfrozen.

I am Xiao O, a professional analyst and teacher, a mentor and friend on your investment journey! As an analyst, the most basic thing is to help everyone make money. I will help you solve confusion and issues, speaking with strength; when you are lost and don't know what to do, follow Xiao O, and I will guide you.

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