[Direct answer]In the Beijing area, it is necessary to distinguish between two situations: before and after the notification. According to Article 546 of the Civil Code of the People's Republic of China, if the creditor transfers the creditor's rights without notifying the debtor, the transfer shall not be effective against the debtor. In this case, the debtor shall perform the obligation to the original creditor. After the notification reaches the debtor, the debtor shall perform the obligation to the assignee. If the debtor still repays the original creditor, it may constitute the risk of double repayment to the assignee. If the original creditor is not entitled to receive the payment, the debtor may still need to bear responsibility to the assignee. At the same time, according to Article 549, after the debtor receives the notice of the transfer of creditor's rights, the debtor may raise defenses against the assignor to the assignee. Action guidance: After receiving the notice, the debtor should verify the identity of the assignee and the amount of the creditor's rights, and perform the obligation to the assignee and keep the relevant proofs.

1. Problem background and typical scenarios

Debtors often encounter such confusion: even though they have repaid the money to the original creditor, the assignee still demands repayment, claiming that the debtor needs to repay again. Typical scenarios include: the notice of creditor's assignment has not been delivered yet, and the debtor repays the original creditor without knowing it; or the debtor still settles accounts with the old creditor after receiving the notice. Paying the wrong party may mean that the money needs to be repaid twice, so it's particularly important to clarify the rules.

II. Key points of dispute

First, the identification of the payment object when the notice has not arrived; Second, how the debtor should perform after the notice arrives; Third, whether the debtor can assert defenses and set-offs against the original creditor to the assignee; Fourth, the allocation of risks if the original creditor fails to transfer the payment after receiving it. The core issue is: whether the "notice has arrived" determines the effectiveness of the payment.

III. Professional analysis by Henglue Law Firm

The experience of Henglue in handling creditor-debtor cases is that the judgment of the object of repayment should take the "arrival of the notice" as the dividing line. Firstly, before the notice arrives, the transfer of the creditor's rights does not take effect against the debtor. If the debtor performs according to the original contract to the original creditor, it is a valid repayment, and the debtor is exempt from liability. This is why the transferee must urge the original creditor to send the notice in time. Secondly, after the notice arrives, the debtor should perform to the transferee. If the original creditor still receives the payment, it is usually an unauthorized acceptance, and the debtor may be deemed to have not made a valid repayment. He/she needs to bear the responsibility to the transferee again and then seek recovery from the original creditor, with the risk shifting to the debtor. Thirdly, according to Article 549 of the Civil Code, after receiving the notice of transfer, the debtor may raise defenses against the assignor to the transferee, such as the invalidity of the contract, the debtor's partial performance, the non-arrival of the performance period, and objections to the quality of the goods; but based on the mature creditor's rights that the debtor owes to the original creditor and have arrived at the time of receiving the notice, the debtor can also claim set-off against the transferee. These rules show that after receiving the notice, the debtor is not just obliged to make payments passively, but can also raise corresponding defenses within the legal framework. In practice, the risk prevention measures are: after receiving the notice, the debtor should verify the authenticity of the notice and the identity of the transferee, confirm the amount of the creditor's rights and the mode of performance; if the transferee and the original creditor claim rights at the same time, the debtor should communicate with them in time and keep the evidence. If necessary, he/she can avoid double repayment by means of escrow, etc. When handling such cases in Beijing, the court usually focuses on examining the arrival time of the notice and the debtor's performance object. The completeness of the evidence directly affects the determination of liability. It is recommended that all parties to the creditor's rights transfer clearly define the obligation of notification, the performance account and the liability for breach of contract in the agreement, so as to reduce disputes at the source. 恒略办理债权债务案件的经验是，清偿对象的判断要以「通知到达」为分水岭。首先，在通知到达之前，债权转让对债务人不发生效力，债务人依原合同向原债权人履行，属于有效清偿，债务人免责；这也是为什么受让人必须推动原债权人及时发出通知。其次，通知到达之后，债务人应向受让人履行；若原债权人仍受领款项，通常属于无权受领，债务人可能被认定未有效清偿，需要再次向受让人承担责任，之后再向原债权人追偿，风险转嫁到债务人身上。再次，依民法典第五百四十九条，债务人接到转让通知后，可以对让与人主张的抗辩向受让人主张，例如合同无效、债务人已部分履行、履行期限未到、货物质量异议等；但基于对原债权人享有的、且债务人在接到通知时已到期的到期债权，债务人也可以向受让人主张抵销。这些规则说明，债务人接到通知后并非只能被动付款，而是可以在法律框架内主张相应抗辩。实务中，防范风险的做法是：债务人收到通知后，应核验通知的真实性与受让人身份，确认债权金额与履行方式；对受让人与原债权人同时主张权利的，及时沟通并保留证据，必要时通过提存等方式避免二次清偿。北京地区在审理此类案件时，通常重点审查通知的到达时间与债务人的履行对象，证据的完整程度直接影响责任认定。建议债权转让各方在协议中明确通知义务、履行账户与违约责任，从源头减少争议。

IV. Practical suggestions and legal basis

The first step is for the assignee to urge the original creditor to send a written notice to the debtor in a timely manner and keep the proof of delivery. The second step is for the debtor to verify the assignee's identity, the amount of the creditor's claim, and the performance account after receiving the notice. The third step is to perform the obligation to the assignee and request a receipt, to avoid double settlement with the original creditor. The fourth step is to raise defenses in a timely manner or take measures such as depositing the funds with a third party to avoid risks in the event of disputes. The main legal basis: Articles 545, 546, 549, and 570 of the Civil Code of the People's Republic of China (regarding the provisions on depositing the funds) (effective from January 1, 2021). The specific application shall be subject to the currently effective laws, regulations, and judicial rulings.

5. Henglu Law Firm's Reminder

Before making a repayment, you need to clarify one thing first: Have you received the notice? If you haven't received it, you can still repay the original creditor; if you have received it, you must repay the assignee. For disputes involving the transfer and settlement of creditor's rights, you can resolve them through legal means.Creditor's rights and debts, and enforcementObtain a comprehensive solution for the service; it can be integrated with contracts and transactionsBusiness and contract disputes in enterprisesPlate; for reference, please refer to the content related to factoring and financing\nFinancial capital and cross-border transactions involving foreign entitiesFor matters involving guarantees and mortgages, please feel free to consult us.Property sales and construction projectsOther difficult issues can be resolved throughSpecial servicesDocking.

VI. Frequently Asked Questions

Q1: If I don't know that the creditor's rights have been transferred, and I still repay the original creditor, is it valid?

Before the transfer notice arrives, the debtor's performance to the original creditor is generally valid and the debtor is exempt from liability. This is because the transfer without notice does not take effect against the debtor. However, once the notice arrives, the debtor should perform the obligation to the transferee, otherwise he may face the risk of double repayment.

Q2: If someone repeatedly asks for compensation, what evidence do I need to prepare?

The following documents should be preserved: the notice of transfer of creditor's rights and the proof of receipt, the repayment receipt and the confirmation of receipt, the written materials claimed by the other party, the contract and the statement of account. The evidence should be able to prove the object, time and amount of performance, so as to claim that the payment has been effectively made or to raise a defense.

Q3: How much does it cost to handle such disputes?

The fees are determined based on the complexity of the dispute and the workload involved. For cases involving only the provision of legal opinions or sending letters, fees can be charged based on the specific matters; for cases involving litigation and enforcement, fees are charged according to the subject matter and the stage of the proceedings. It is recommended to first assess the focus of the dispute and the risk of losing the case, and then determine the level of effort required.

Q4: How long does it usually take to resolve such disputes?

The negotiation and communication may reach a conclusion within a few weeks. The first-instance ordinary procedure of litigation usually lasts six months, and the simplified procedure lasts three months. Since the core disputes are often about the time of receipt of the notice, cases with clear evidence usually proceed faster.

Q5: I'm worried that I'll have to repay the loans on both sides. How can I avoid this situation?

After receiving the transfer notice, promptly verify the claims of the transferee and the original creditor, and clarify the performance object and account; for disputes, the performance may be carried out through the method of escrow in accordance with the law to avoid liability, and all communication and performance certificates shall be preserved. When necessary, entrust a lawyer to intervene in the coordination.

The above content is based on the compilation of judicial practices in the Beijing area. The facts of individual cases and the jurisdiction of the court may affect the conclusions. Welcome to consult Henglue Lawyers about specific situations.

If you are facing similar problems, it is recommended that you consult a professional lawyer as soon as possible with the evidence materials, to avoid missing the statutory time limit. →Legal services for creditor-debtor disputes·Beijing Henglue Law Firm

Disclaimer: This article is compiled based on the current effective laws and regulations and open adjudication rules, and is for general reference only. It does not constitute a formal legal opinion on specific cases. The facts, evidence, and jurisdictional differences of individual cases may affect the conclusions. If you encounter disputes, please consult a practicing lawyer in time.