[Direct answer]In the Beijing area, it is possible to file a lawsuit. The loss of evidence affects the difficulty of providing proof, not the right to sue itself. According to the provisions of the Civil Procedure Law of the People's Republic of China (amended in 2023), to file a lawsuit, it is only necessary to meet the following conditions: the plaintiff has a direct interest in the case, a clear defendant, specific litigation requests and factual grounds, and the case falls within the scope of acceptance by the people's court and the jurisdiction of the sued court. The promissory note is not a necessary material for filing a lawsuit. In practice, lenders can use the following evidence to replace and supplement it: bank transfer records, Alipay and WeChat payment records to prove the delivery of funds; chat records, emails, and call recordings to prove the lending agreement and the amount and term agreed upon; collection letters and collection chat records to prove the existence of the debt and the possible interruption of the statute of limitations; witness statements to prove the fact of cash delivery; and records of the other party's partial repayment or payment of interest to corroborate the real existence of the debt. Two points should be noted: first, the transfer records can only prove the transfer of funds, but evidence is needed to show that the funds belong to a loan rather than an investment, a gift, or a repayment; second, according to Article 188 of the Civil Code of the People's Republic of China (effective January 1, 2021), the statute of limitations for requesting protection of civil rights from the people's court is three years, calculated from the date when the right holder knows or should know that his rights have been infringed and the date when the obligee knows or should know that his obligations have been violated. Collection can cause the interruption of the statute of limitations.Creditor's rights and debts, and enforcement casesYou can view similar questions in this column.

I. Problem Background and Typical Scenarios

When parties consult on this issue, it usually stems from several situations: first, the original promissory note or IOU is lost, and only copies or photos remain; second, the payment was made in cash at the time, with neither a promissory note nor a transfer record, only an oral agreement; third, the content of the promissory note is simple, only stating the amount and signature, without specifying the purpose or repayment time; fourth, the loan was transferred through another person's account, with the payer and lender not being the same, requiring an explanation of the funding chain; fifth, the time span is long, and some chat records have been deleted, leading to disputes between the parties over the loan amount and interest. When handling such cases in Beijing, the court usually reviews factors such as the parties' relationship, financial capacity, the source and flow of funds, and transaction habits to determine whether a lending relationship exists. If the evidence is insufficient, the parties can apply to the court to retrieve bank transaction records, communication records, or relevant registration materials. If the debtor transfers assets or needs to preserve evidence, these factors can also be taken into account simultaneously.Business and contract disputes in enterprisesColumn.

II. Key points of dispute

Focus One: Whether a lending relationship exists and the allocation of the burden of proof when a promissory note is unavailable. Focus Two: Determining the nature of the funds involved—whether the transfer constitutes a loan, an investment, a gift, or a repayment. Focus Three: Proving the delivery of cash—the combined use of withdrawal records, witness statements, and explanations of the funds' purpose. Focus Four: Determining the loan amount and interest rate when there is no written agreement. Focus Five: Whether the statute of limitations has expired and whether collection records can prove its interruption. Focus Six: The issue of legal standing when the payer and lender are not the same person. Focus Seven: Assessing the authenticity and completeness of evidence—determining the probative value of copies, screenshots, and audio recordings. The specific determinations shall be based on the currently effective laws, regulations, and judicial rulings.

III. Professional analysis by Henglue Lawyers

From the practical experience of lawyers handled by our firm, the key point of handling cases after the loss of evidence is to organize scattered evidence into a verifiable chain of evidence. The first step is to sort out the financial traces by restoring the time, amount, and flow direction of each payment through bank statements, Alipay and WeChat payment records, and making a comparison table of financial transactions. At the same time, attention should be paid to the relationship between the payment account and the actual lender, and if necessary, the reasons for relatives' payment on behalf of others or the company's payment on behalf of others should be explained. The second step is to find favorable evidence by checking the expressions of the loan amount, purpose, and repayment time in WeChat, text messages, and emails. The original carriers should be preserved rather than just saving screenshots. The audio materials should indicate the recording time, participants, and main content. The third step is to fix the evidence of collection by sending written collection letters, WeChat or text messages in time to clarify the claimed debt amount and repayment requirements. This can not only prompt the other party to admit the debt, but also trigger the interruption of the statute of limitations. The fourth step is to use indirect evidence, such as records of the other party's past interest payments or partial repayments, statements from the borrower's spouse or co-operators, and expenditure vouchers related to the purpose of the loan. Finally, if the evidence is insufficient, the lawyer can apply to the People's Court for investigation and collection of evidence according to law, or supplement the evidence through the other party's self-admission in litigation. It should be noted that the statements of the other party admitting the debt in chats or calls have high probative value and should be properly preserved; while for copies, the original should be provided or the whereabouts of the original explained as much as possible to avoid being denied due to doubts about authenticity.

IV. Practical suggestions and legal basis

Action suggestions: First, sort out and fix the existing evidence as soon as possible, organize the transfer vouchers, chat records, audio recordings, and collection records in chronological order, and keep the original carriers. You can refer to the relevant paths of creditor's rights realization for more details.Creditor's rights and debts, and enforcement casesFirst, it is necessary to clarify the rights and obligations of both parties through the column; second, it is important to promptly send written reminders for collection and retain the delivery certificates, which not only asserts rights but also interrupts the statute of limitations. It is necessary to pay attention to the three-year statute of limitations; third, it is necessary to communicate with the other party to make them acknowledge the fact of the debt and form a new confirmation record. The relevant contract review ideas can be referred to for referenceBusiness and contract disputes in enterprises1. The column; 2. The case materials; 3. The third-party guarantee; 4. The cash payment, collecting the withdrawal vouchers, witness statements, and explanations of the funds' use; 5. Applying to the court for evidence collection, such as bank transaction records and communication records, when necessary; 6. Assessing the defendant's financial status before suing and, if necessary, applying for pre-litigation or litigation property preservation to prevent the transfer of assets affecting enforcement. Legal basis: - The Civil Procedure Law of the People's Republic of China (amended in 2023) regarding the conditions for suing, evidence collection, and investigation; - Article 188 of the Civil Code of the People's Republic of China (effective from January 1, 2021) regarding loan contracts; - The Supreme People's Court's Several Provisions on Evidence in Civil Procedure (effective from May 1, 2020) regarding the types of evidence and their probative value; - Specific applications shall be subject to the currently effective laws, regulations, and judicial rulings.

5. Henglu Law Firm's Reminder

Firstly, the loss of a promissory note does not mean that it's impossible to file a lawsuit. The key is whether other evidence can reconstruct the facts of the loan. Secondly, transfer records can only prove the transfer of funds, but additional evidence is needed to demonstrate that the funds belong to the loan. Thirdly, chat records and audio recordings should be preserved in their original form. Screenshots and transcripts have weaker evidentiary value. Fourthly, collection efforts are necessary, as they not only assert rights but also interrupt the statute of limitations. Fifthly, it's most difficult to provide evidence of cash payments, so it's advisable to collect withdrawal receipts and witness materials as early as possible. Sixthly, assessing the other party's financial status and considering asset preservation before filing a lawsuit often helps to better realize creditor's rights than simply winning the lawsuit.

VI. Frequently Asked Questions

Q1: Can I still sue if I've lost the IOU?

Yes. It's not necessary to have a promissory note to file a lawsuit. You can use evidence such as transfer receipts, chat records, collection records, audio recordings, and witness statements to prove the lending relationship. The court will comprehensively determine the lending relationship based on the evidence.

Q2: Can I only get my money back with the transfer records?

There are uncertainties. The transfer records can only prove the exchange of funds, but additional evidence is needed to prove that the funds in question belong to the loan, such as chat records, call recordings, and records of the other party paying interest or making partial repayments.

Q3: What should I do if I lend out cash without a receipt?

You can collect bank withdrawal receipts, proof of the source of funds, statements from witnesses present, and communication records about the purpose of the loan, and try to get the other party to confirm the fact of the debt in writing or via chat, in order to form new evidence.

Q4: Can I still sue someone if I've borrowed money from them for a long time?

It depends on the statute of limitations. According to Article 188 of the Civil Code of the People's Republic of China, the statute of limitations period is three years, calculated from the date when the right holder knows or should have known that his rights have been infringed and the date when the obligee becomes aware of it. Collection actions and other similar behaviors may interrupt the statute of limitations.

Q5: Can WeChat chat records be used as evidence?

Yes. Chat records are electronic data, but the original carrier should be preserved, and the complete conversation and identity information should be displayed. If only screenshots or transcripts are provided, the probative force may be affected.

This article is written based on the common judicial interpretations in the Beijing area. If the case occurs in other regions, it is recommended to consult local lawyers to verify the regional differences.

If you are facing similar problems, it is recommended that you consult a professional lawyer as soon as possible with the evidence materials, so as 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 a dispute arises, please consult a practicing lawyer in time.