Paying attention to a few points can effectively prevent your card from being frozen due to receiving black money:
(1) For OTC transactions, try to choose large platforms such as Binance and EURUSD. These platforms have good communication channels and risk control measures with mainland regulatory agencies and law enforcement agencies.
(2) Try to choose an OTC platform that supports T+1/T+2 withdrawal strategies. Although you cannot withdraw cash immediately after selling coins, it reduces the risk of money laundering through OTC transactions. For example, Binance T+1 and Huobi Strict Selection Trading (compared to free trading, T+2 withdrawal).
(3) Avoid directly using stablecoins such as USDT for OTC transactions. Instead, try to use mainstream currencies such as BTC and ETH for OTC transactions.
（4）The bank card used for OTC transactions must be a separate card that is normally unused, separated from salary cards, so that even if it is frozen, it will not affect the use of other funds. It will also be easier to clarify the flow of funds when cooperating with investigations.
（5）For OTC transactions, try to use local bank cards, such as various local city commercial banks and rural commercial banks. 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, and law enforcement agencies can generally freeze them directly.
（6）Do not frequently trade with fixed merchants, and avoid frequent transactions with fixed users. If the same user indirectly makes more than 3 purchases in one day, or buys and then sells a few hours later, it can be very dangerous and has a strong suspicion of money laundering.
（7）Find reliable OTC merchants for trading. Try to actively take orders from large merchants and large market makers, minimize hanging orders, and avoid merchants in problematic areas. In fact, as an ordinary user, it is very difficult to discern which merchants are reliable. For example, friends who frequently traded with Huobi Blue Shield service merchants have also had their cards frozen.
（8）Reduce the frequency of withdrawals and increase the amount of cash conversion.
（9）After OTC transactions, 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 through an ATM or spend it online.
（10）Try to choose weekdays for cash conversion. It is best to conduct transactions during normal working hours, such as between 9 AM and 9 PM.
（11）Do not immediately transfer out after receiving funds. After selling USDT for RMB, do not transfer it out immediately; keep it in the account for a period of time.
If your card is unfortunately frozen, how should we explain it to prove that we have not participated in money laundering activities?
（1）Individuals engage in normal bitcoin buying and selling transactions and do not involve money laundering or other illegal transactions;
（2）Unawareness of being implicated in crimes related to debts received from selling coins;
（3）Cooperate by providing all transaction records, chat records, and on-chain transfer records;
（4）You must be very clear that engaging in digital asset trading does not violate the law.
In OTC transactions, if the withdrawal bank card is frozen by public security judicial freezing, what materials will the other party require individuals to provide to lift the freeze?
Common materials that need to be provided mainly include: complete transaction records, such as bank card transaction records, on-chain transaction records, trading platform order records, WeChat chat records (which must include the content of the trading process), and other evidence that can prove the legality of assets, even income proof, etc.
So, if you unfortunately receive dirty money and your card is frozen, how should you resolve it?
First, go to the bank where the account was opened to understand the reason for the card freeze and which authority has the power to freeze it.
The reasons for card freezing can be summarized into two categories: bank risk control and public security freezing:
1. Bank risk control. The cause of bank risk control may be recent frequent large transfers of the card, concentrated transfers out from dispersed transfers in, quick in and out transactions, frequent night transactions, and not leaving a balance in the account, collectively referred to as transaction anomalies. This triggers the bank's anti-money laundering risk control system.
2. Public security freezing. Usually occurs when the account has received other illicit funds related to the case, which may have been received directly or indirectly. The public security will freeze all related accounts through which the associated funds have flowed to prevent fund transfer and facilitate case investigation.
How to resolve the two reasons for card freezing?
1. For bank risk control freezing:
Bring your ID card and bank card to the bank where the account was opened for communication, and submit relevant transaction account proof. If it involves public security policy directives, you also need to cooperate with the local public security department's investigation. If it triggers the anti-fraud center's monitoring, you will need to fill out the anti-fraud application form required by the anti-fraud center, and you can only be unfrozen after passing the review.
2. Responding to public security judicial freezes:
First observe for 3 days. See if the temporary stop payment has turned into a formal freeze (continuing freeze for half a year). If it turns into a formal freeze, go to the bank where the account was opened immediately, inquire about the name of the public security unit that froze the card, the case number, and the name of the police officer in charge of the case. Then contact the responsible police officer to understand the reason for the card freeze and cooperate with the police investigation. After verifying that you have not engaged in any illegal or disciplinary actions, your account will be unfrozen.
The key point is:
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