A sudden voice comes from the other end of the line: "Hello, this is the XX Public Security Bureau. We need to verify some information regarding your recent bank transactions..."

Even if you’ve been in the crypto world for years, getting a call like this can make your heart skip a beat. But it’s precisely at times like these that you need to stay calm—panic and a slip of the tongue can easily complicate a simple matter. Here are three tips to help you cooperate with the investigation without causing yourself unnecessary trouble:

**🔍 First Tip: Clarify the Legality of the Transaction**

If the police ask whether your transaction is compliant, you need to be clear: "Buying and selling virtual currency between individuals is not illegal, but the source of the funds must be clean—if the money is dirty and you use it, you’ll be held accountable."

Simply put, make it clear to the other party that you’re just an ordinary investor, all your operations are conducted on legitimate platforms, and you have nothing to do with any illegal activities.

**💬 Second Tip: Stay Calm When Asked to Refund**

If the police say that the funds you received may be involved in a case and ask you to cooperate in returning them, don’t let your emotions get the better of you. You can respond like this: "I will fully cooperate with the investigation and handle the matter as required."

Then, proactively provide transaction records, transfer receipts, and chat screenshots as evidence. The more cooperative you are, the faster the issue will be resolved, and the less likely your other bank cards will be affected. Being confrontational will only escalate a small issue into a big problem.

**⚖️ Third Tip: Understand How Cases Are Handled and Know the Difference**

Here’s an important distinction:
- If you are found to be directly involved in illegal activities, all your accounts may be frozen
- But if you were simply conducting a normal transaction and happened to receive problematic funds, usually only the involved bank card will be frozen

The key point to remember: cooperating with the investigation won’t result in a criminal record. But if you refuse to cooperate? Then it becomes a different matter, and the actions taken will escalate accordingly.

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**A Final Word**

Crypto trading isn’t like buying vegetables at the market—every transaction could be hiding a storm behind it. That’s why you must develop the "three-check habit":
✅ Verify the other party’s identity (must be real-name verified)
✅ Check the source of funds (transaction history must be clean)
✅ Check the wallet address (ensure its security)

In this space, steady and cautious is always more important than chasing quick gains. Protect your own wallet—don’t get unwittingly caught up in someone else’s scam.