Selling USDT and Received Police Assistance Investigation Notice? How to Prove Legitimate and Compliant Source of Funds?

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When you are selling USDT (U) and receive a police assistance investigation (xiecha) notice, you can quickly prove the legitimate and compliant source of funds through complete transaction records, bank statements, and proof of asset origin. An assistance investigation does not mean you have committed a crime; the key is whether you can promptly provide genuine and detailed materials. You should preserve all platform transaction screenshots that clearly show the flow of funds, which can effectively reduce misunderstandings. You can also prepare property certificates or bank deposit proofs to help the police quickly verify.

Core Key Points

• Preserve complete transaction records and bank statements so every transaction is traceable, effectively proving the legitimacy of fund sources.
• Verify counterparty identity before trading to avoid transactions with high-risk accounts and reduce the risk of being investigated.
• Prepare proof of asset sources, such as property certificates and bank deposit certificates, to enhance the credibility of materials and facilitate quick verification.
• When receiving an assistance investigation notice, stay calm, promptly organize relevant materials, actively cooperate with the investigation, and avoid account freezing.
• Seek assistance from professional lawyers to ensure materials are compliant, improving efficiency and effectiveness in handling investigations.

Reasons for Receiving Police Assistance Investigation When Selling USDT

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When conducting USDT (U) transactions, you may encounter situations where selling USDT triggers a police assistance investigation request. The investigation is not aimed at all USDT selling activities but mainly focuses on transactions with abnormal funds or suspected illegal involvement. Chinese law allows individuals to hold and transfer virtual currencies under compliant conditions, but if illegal activities are involved, public security organs will intervene and investigate according to law. You need to understand common reasons for such investigations and take preventive measures in advance.

Unclear Source of Funds

When you cannot clearly explain the source of funds, it easily triggers a police assistance investigation when selling USDT. Chinese law enforcement pays close attention to fund flows, especially large or frequent virtual currency transactions. You need to prepare the following materials to prove the legitimacy of fund sources during an investigation:

• Exchange account statements, showing acquisition date, amount, and value
• Wallet screenshots showing currently held assets and timestamps
• Transaction history of all wallets used to hold or transfer large amounts of funds
• Source-of-funds report prepared by qualified professionals, preferably including blockchain analysis
• Proof of wallet ownership via signed messages or cryptographic verification
• All fiat deposit records (such as bank transfers to exchanges, payment receipts)
• Original acquisition documents (such as mining receipts, ICO participation records, airdrop confirmations)

If you cannot provide the above materials, your account may be frozen and face further investigation.

Counterparty Risk

If your trading counterparty is involved in illegal activities during the transaction process, you may also be implicated in an assistance investigation. Chinese public security organs focus on cracking down on the following behaviors:

You should verify the identity of trading counterparties and avoid fund dealings with high-risk accounts.

Large Fund Flows

Frequent or large-amount USDT selling easily attracts regulatory attention. Data shows that in cases involving illegal foreign exchange transactions, single transactions can reach USD 1.33 billion, and money laundering activities are also common. Public security organs will focus on screening accounts with abnormal fund flows and huge amounts. If you cannot prove the source of funds yourself, you may be investigated, and in severe cases, face legal liability.

During the USDT selling process, you must operate in a standardized manner, retain complete materials, and proactively prevent risks to effectively respond to assistance investigations.

Preparation of Proof Materials

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When selling USDT and receiving a police assistance investigation notice, you need to prepare a complete and genuine set of proof materials in advance. These materials can not only help you quickly prove the legitimate and compliant source of funds but also effectively reduce the risk of account freezing or further investigation. You should start from four aspects: transaction records, bank statements, platform screenshots, and asset source proof, ensuring every link is traceable and verifiable.

Transaction Record Preservation

After every virtual currency transaction, you should promptly save detailed transaction records, including transaction time, amount, counterparty information, transaction hash, etc. You can use blockchain explorers (such as blockchain.com) to query and export transfer records for each USDT; these data carry high public credibility. Blockchain analysis tools can transform complex on-chain data into actionable intelligence, helping you clearly demonstrate fund flows and transaction patterns. During investigations, law enforcement usually focuses on analyzing cryptocurrency payment flows to determine whether funds are involved in suspicious activities.

You can download complete transaction statements from compliant platforms such as Biyapay; the platform automatically generates PDF or spreadsheet files for easy archiving and submission. It is recommended to regularly back up these data to avoid information loss due to platform changes or account abnormalities.

Tip: You can organize all transaction records in chronological order, annotating the origin and destination of each fund, making it easy to quickly locate and explain during an assistance investigation.

Bank Statements and Fund Flows

Bank statements are the most direct proof of fund flows. You should retain all bank transfer records related to virtual currency buying and selling, including deposit and withdrawal details. It is recommended to prioritize Hong Kong licensed banks for fiat settlement; statements from such banks carry greater authority in international compliance reviews. You can export detailed USD account statements through online banking systems, ensuring every fund corresponds one-to-one with on-chain transactions.

During a police assistance investigation when selling USDT, law enforcement usually requires you to provide the correspondence between bank statements and blockchain transactions. You can use a table format to associate bank statements, platform order numbers, and blockchain hashes, enhancing the logic and persuasiveness of the materials.

Platform Transaction Screenshots

When buying and selling USDT on mainstream platforms such as Biyapay, you should promptly save screenshots of each order. Screenshots should include key information such as order number, transaction amount, counterparty account, transaction status, etc. Platform screenshots can visually reflect the real transaction process between you and the counterparty and serve as important evidence during assistance investigations.

You can archive screenshots by month with standardized naming for easy later retrieval. Some platforms support one-click export of historical orders; it is recommended to download backups regularly. During investigations, law enforcement often requires three-party correspondence among platform transaction screenshots, bank statements, and blockchain records. You can prepare comparison tables in advance to improve material completeness.

Note: Screenshots must be clear and free of tampering traces to avoid affecting investigation results due to evidence defects.

Proof of Asset Sources

Proof of asset sources is key material for proving the legitimacy and compliance of your funds. You can prepare the following types of supporting documents:

• Copies of property ownership certificates (if funds come from property sales)
• Bank deposit certificates (showing historical accumulation of large amounts)
• Stock or U.S. stock account asset certificates (if funds come from U.S. stock investment returns)
• Contracts, invoices, and other legitimate income vouchers
• Asset certificates issued by other authoritative institutions

All asset proof materials are recommended to be stamped by relevant departments or certified to enhance legal effect. You should ensure materials are genuine and complete, and avoid using false or forged documents. During a police assistance investigation when selling USDT, law enforcement usually makes a comprehensive judgment based on asset proof, bank statements, and blockchain data. Only by achieving a closed loop of material chains can you effectively eliminate suspicions of tainted funds.

Tip: You can ask professional lawyers or accountants to assist in organizing asset proof to ensure materials meet international compliance standards.

Handling the Police Assistance Investigation Process When Selling USDT

Handling Upon Receiving the Assistance Investigation Notice

When you receive a police assistance investigation notice for selling USDT, first stay calm. Do not panic, and do not attempt to conceal or delete any transaction records. You need to immediately self-assess whether there is any criminal risk. Review all recent USDT transactions to check for abnormal large fund flows, unclear fund sources, or dealings with high-risk accounts. If you find any issues, proactively organize relevant materials and prepare to cooperate with the investigation.

You should also note that during the assistance investigation period, accounts may be frozen. Account freezing not only affects your fund liquidity but may also bring legal and reputational risks. For example, freezing funds without proper legal procedures may trigger legal disputes. If the freezing action is questioned, it may also affect your public image. You should promptly communicate with relevant institutions to understand the reasons for freezing and the unfreezing process, avoiding missing legitimate investment opportunities due to improper handling.

Recommendation: You can proactively contact a lawyer to assess your own risks, prepare explanations and proof materials in advance, and improve response efficiency.

Communication with Banks and Platforms

During the police assistance investigation process when selling USDT, you must maintain close communication with banks and trading platforms. You can immediately call your account-opening bank to explain the assistance investigation situation, inquire about account status and follow-up procedures, and request detailed account statements for subsequent material preparation. Choosing Hong Kong licensed banks helps enhance the authority and international recognition of materials.

You also need to contact the USDT trading platform to obtain transaction records and screenshots of all relevant orders. Platform customer service usually assists in exporting historical data and providing necessary compliance certificates. You can correspond bank statements, platform orders, and blockchain hashes to form a complete fund flow chain.

• Timely communication helps clarify misunderstandings and shorten account freezing time.
• You can request platforms and banks to issue certificates of cooperation in the assistance investigation to enhance material completeness.
• Maintaining transparent communication helps reduce operational and privacy risks caused by account freezing.

Writing the Explanation Statement

When preparing the explanation statement, you need to use clear and truthful language to comprehensively describe the source of funds and transaction process. The explanation statement is an important material for proving your innocence to law enforcement agencies. You can refer to the following elements:

• Detailed explanation of how each USDT was acquired (such as trading, mining, airdrops, etc.).
• List all fund inflow and outflow accounts, attaching bank statements and blockchain hashes.
• Explain the identity of trading counterparties and the compliance verification process.
• Provide all proof of asset sources, such as property certificates, deposit certificates, contracts, etc.
• State whether there was third-party assistance or witnessing to enhance material credibility.

During investigations, law enforcement usually conducts quality investigations combining your explanation statement, bank and platform materials to find necessary information. You can proactively cooperate by providing wallet addresses, transaction hashes, and other data to facilitate law enforcement tracking of fund flows. If funds are frozen or seized, relevant institutions will issue instructions according to legal procedures. You should truthfully explain and avoid omitting key information.

Tip: You can ask a lawyer to assist in writing the explanation statement to ensure the content is compliant, logically clear, and more persuasive.

Notes on Submitting Materials

When submitting proof materials, you need to ensure all documents are genuine, complete, and free of tampering traces. You can categorize materials and organize them chronologically for easy review by law enforcement. You should also pay attention to the following points:

• All materials should be stamped by relevant institutions or certified to enhance legal effect.
• Electronic materials are recommended in PDF format to avoid format compatibility issues.
• You can prepare a material checklist and verify item by item to prevent omissions.
• Retain all submission records and receipts for later tracing.

During the period of police assistance investigation when selling USDT, maintain smooth communication with law enforcement, banks, and platforms. You can proactively follow case progress, promptly supplement materials, and strive to unfreeze accounts as soon as possible. Through standardized operations and material preparation, you can effectively reduce legal and operational risks and protect your legitimate rights and interests.

Legal Consultation and Risk Prevention

Timing for Lawyer Involvement

When facing a police assistance investigation notice for selling USDT, timely seeking help from a professional lawyer is very important. A lawyer can help you review the transaction process, assess whether there is criminal risk, and assist in preparing compliant materials. You should immediately contact a lawyer in the following situations:

• Account is frozen, and bank or platform requires explanation of fund sources
• Public security organ issues an assistance investigation notice and requires cooperation
• Trading counterparty is suspected of illegality, implicating your fund flows
• Incomplete materials prevent self-proving legitimate and compliant funds

A lawyer can not only provide legal opinions but also assist you in communicating with banks, platforms, and law enforcement to maximize protection of your legitimate rights and interests.

Standardized Operation Recommendations

In daily transactions, you should strictly comply with relevant Chinese laws and regulations to ensure every fund flow is clear and legal. Compliance experts recommend that you:

• Choose licensed companies for USDT transactions; only licensed companies can move USDT on behalf of clients to ensure legal transactions
• Use regulated platforms that cooperate with licensed U.S. banks to safeguard fund security
• Allow banks to conduct compliance checks before funds arrive in accounts to prevent inflow of “dirty money”
• Comply with foreign exchange management regulations to avoid legal risks caused by non-compliant operations
• Use VPN during transactions to protect personal information security

You should also retain all transaction records, bank statements, and asset proofs, regularly self-check fund flows, and prevent account freezing due to negligence.

Compliant operations not only reduce the probability of assistance investigations but also enhance your credibility with banks and platforms.

Reducing Criminal Risks

When conducting virtual currency transactions in mainland China, you must attach great importance to criminal risks. Common legal traps include violating cryptocurrency bans, participating in money laundering, unclear fund sources, etc. You can reduce risks through the following methods:

• Only cooperate with clearly identified and compliant counterparties to avoid involvement in illegal activities
• Ensure all fund sources are legitimate, and be ready to provide proof materials at any time
• Upon discovering account abnormalities or assistance investigation, cooperate with investigation immediately and seek lawyer assistance
• Avoid participating in high-risk P2P markets to prevent fraud and fund losses

If you violate relevant Chinese regulations, you may face asset confiscation, account freezing, or even criminal penalties. Standardized operations and proactive compliance are the best ways to protect your rights and interests.

Common Questions and Operation Suggestions

Handling Incomplete Materials

If you find proof materials are incomplete during the assistance investigation, you can take the following remedial steps:

1. You should first prepare identity proof and existing legitimate fund source records. Even if some materials are missing, basic identity and fund proof remain crucial.
2. You can try to reconstruct the entire fund transfer process as much as possible. Collect all available transaction hashes, wallet addresses, transaction times and amounts, and use platforms such as Biyapay to export historical records to help rebuild the fund chain.
3. If you suspect the counterparty engaged in fraudulent behavior, proactively collect relevant evidence to prove your transaction was normal buying and selling and the counterparty’s actions are suspected of crime.
4. You can ask professionals to assist in creating fund flow diagrams that clearly show inflows and outflows of each fund, making it easier for law enforcement to understand the overall fund path.

It is recommended to proactively communicate with a lawyer during material supplementation to ensure all added content is genuine and compliant.

Handling Account Freezing

When encountering account freezing, it is recommended to take the following measures:

• You should immediately contact the account-opening bank to understand the freezing reason and specific requirements. Hong Kong licensed banks usually provide detailed explanations.
• You need to organize and preserve all evidence related to the transaction, including chat records, platform transaction screenshots, and bank statements.
• Be wary of “unfreezing services” online and avoid secondary fraud by trusting strangers.

You can export complete transaction statements through compliant platforms such as Biyapay to facilitate subsequent communication with banks and law enforcement.

Process for Restoring Transactions

After account unfreezing, you can refer to the following process to resume transactions:

• You should proactively provide complete transaction records and KYC information to platforms and banks. Platforms such as Biyapay support one-click export of historical orders for quick fund source verification.
• You need to explain to law enforcement that the received funds are from normal transactions and do not constitute criminal proceeds. You can supplement explanations with asset proof and fund flow diagrams.
• You can cooperate with the “no objection” process, having the complainant issue a no-objection statement to help law enforcement focus on actual criminal suspects, accelerating unfreezing and transaction restoration.

Before resuming transactions, it is recommended to self-check all fund flows again to ensure every fund can prove its legitimacy and reduce future assistance investigation risks.

In virtual currency transactions, you must attach importance to standardized operations. You should retain complete transaction records and asset proofs. When encountering police assistance investigation notices for selling USDT, timely communication and active cooperation are very important. You can consult lawyers at any time to ensure fund sources and counterparties are compliant. This way, you can effectively reduce criminal risks and protect your legitimate rights and interests.

FAQ

How long does it take to unfreeze an account after receiving an assistance investigation for selling USDT?

After submitting complete materials, law enforcement will decide the unfreezing time based on case complexity. Generally, the process takes several weeks to several months. You should proactively follow case progress and promptly supplement required documents to improve unfreezing efficiency.

What to do if proof materials are lost?

You can contact trading platforms, banks, or relevant institutions to reissue statements and order records. You can also organize auxiliary materials such as emails and chat records to help reconstruct fund flows. It is recommended to back up important files promptly to prevent future loss.

Do proceeds from selling USDT need to be taxed?

Proceeds from selling USDT in mainland China are considered personal income. You should proactively declare and pay relevant taxes according to Chinese tax law. It is recommended to consult a professional tax advisor to ensure compliant taxation and avoid subsequent legal risks.

How to determine if a trading counterparty is high-risk?

You can verify through platform KYC authentication information, historical transaction records, and counterparty fund source proof. You can also pay attention to whether the counterparty’s account frequently changes or involves abnormal large transactions. Trading on compliant platforms helps reduce risks.

Can I continue trading other assets during the assistance investigation period?

If your account is frozen, related assets cannot be operated. You should wait until law enforcement completes processing before resuming normal transactions. It is recommended to suspend large fund flows during the assistance investigation period to avoid triggering new compliance issues.