Recently received a request for help from a friend:

She sold a large amount of U in the fiat currency area on the OKEx platform. Because the other party proposed 'changing bank cards for payment' and assured her 'it's all money transferred from family and is safe,' she continued with the transaction.

However, shortly after the money arrived, the bank card was directly frozen, and the entire amount of 680,000 was marked by the system as related to a case, which is a typical 'buyer’s source of funds is abnormal' leading to associated risks.

Worse still, this is a Level 1 risk card—

After submitting the materials, the officer handling the case told her to 'wait for notification.' She has already been waiting for several days, and after making too many calls, the other party's attitude has become increasingly cold. She now has no idea what to do next.

Such incidents are not isolated cases in the cryptocurrency circle. To help more people avoid pitfalls, I have organized the core issues more clearly👇


One, why was it frozen?

Many novices think that as long as 'the other party sends money first, I will release coins later', it will always be safe.

In fact, it is quite the opposite:

The biggest risk of fiat currency trading is - the money you receive may involve another case.

If the other party's money comes from an abnormal source or has been reported by others, you as the 'receiving party' immediately enter risk control:

  • Bank frozen account

  • Police case filing and investigation

  • Funds are classified as involved amounts



This is not something the platform can control; it is determined by the bank and public security systems.



Two, the larger the amount, the higher the risk

This time it is a large single amount of 680,000.

Lawyers generally suggest:

📌 The larger the amount, do not only submit materials online, otherwise the time efficiency is particularly slow.

The longer the delay, the higher the probability of being regarded as 'abnormal trading'.



Three, what does a first-level risk card mean?

According to the currently implemented relevant regulations:

The involved funds of the first-level risk card may be directly deducted and returned to the victim.

That is to say -

⚠️ The money may be deducted without your consent.

So the process cannot be delayed; it must be confirmed with the handling unit as soon as possible.



Four, communicate with the handling unit; the key is these points

It's not about making more calls, but about asking clearly:

  • What is the nature of this money?

  • What kind of case does the funds belong to?

  • What materials need to be supplemented for unfreezing?

  • Is there a 'partial refund can be unfrozen' processing method involved?

  • How long is expected to give a conclusion within the legal time limit?


Clarifying the process is more effective than blindly urging.



Five, if you do not agree with the handling opinion, you can go through formal relief channels

If you really have objections to the handling opinions of the handling unit, you can legally approach:

  • The upper-level public security organ

  • Or the people's procuratorate at the same level


Submit a supervision application, but it must be based on complete materials and clear facts.



Six, materials should be as complete as possible (very important)

To successfully unfreeze, the following materials should be as complete as possible:

  • Your initial source of funds

  • Where did U come from, and when was it bought?

  • The complete transaction record of this sale

  • Your work proof, source of income


  • Bank statement, which can prove that the card is a 'normal living use card'


  • Screenshots of orders from the trading platform, conversation records


The clearer the materials, the stronger the proof of your 'normal trading behavior'.



Seven, why does this type of freeze happen frequently?

Because the current fiat OTC environment is becoming increasingly strict:

📌 The other party casually changes the receiving card, transfers from unfamiliar accounts, multiple payments on behalf of others

These are the most sensitive characteristics to banks.


The key inducement of this incident is that the buyer proposed 'changing the card for payment' and made multiple payments.



Eight, reminders to all beginners to avoid pitfalls

In one sentence:

Fiat currency trading is not about looking at prices, but about whether the other party's source of funds is reliable.

Remember three points:

  1. Merchants do not change cards, do not make payments on behalf of others, do not have multiple payments

  2. Even merchants with good reviews are not absolutely safe; they can only reduce the probability

  3. Large amounts must be split, must be communicated in advance, must look at the stability of the source of funds


Don't be careless just because it looks like 'money is sent first and then coins are released'.