Preserving Email and WeChat Evidence in a China Supplier Dispute

Situation

A supplier dispute often develops across several channels: an emailed quotation, a revised specification in WeChat, a payment confirmation, and later promises to ship or refund. Saving the last message alone can leave important gaps. Before changing phones, deleting accounts or reorganising company mailboxes, preserve the relevant records and the context that connects them. This is a practical guide, not a report of a HAIYU client matter or a claimed litigation outcome. The checklist below is a suggested records-management approach; it is not a prescribed court filing format. The legal discussion concerns mainland Chinese civil proceedings. An arbitration agreement or another forum may require a different approach.

Key Issue

Emails and instant messages fall within the electronic-data categories recognised by China's Supreme People's Court. Recognition of the category does not establish that a particular screenshot proves a claim. Article 15 addresses originals and qualifying copies or outputs; Article 93 addresses reliability and completeness in creating, storing, transmitting and extracting data. The original/source records and the circumstances of collection therefore matter. See the Supreme People's Court's Evidence Provisions, Articles 14, 15 and 93: https://www.court.gov.cn/zixun/xiangqing/212721.html Ask three practical questions: who was communicating, what exactly was agreed, and how do the messages connect to the transaction? A display name alone may not establish a person's identity or authority to act for the supplier. A payment receipt may show a transfer without explaining which order it concerned.

Documents to Review

• Email originals: retain the relevant messages in the mailbox and preserve available message-source files, full headers and attachments. Keep the original attachment versions, rather than relying only on a forwarded message or a PDF printout.
• Complete chat context: preserve the relevant conversation sequence, visible account identifiers, dates and surrounding messages, including corrections and replies. Do not treat a cropped image or manually retyped transcript as a replacement for the source conversation.
• Devices and account access: identify the phone or computer holding the records and the company staff member responsible for it. Before a device replacement, employee departure or account closure, arrange an authorised preservation plan and test whether backups can be read.
• Transaction records: collect the contract, purchase orders, quotations, specifications, invoices, bank remittance records, delivery documents and inspection material. Use order numbers and dates to connect each communication with the relevant shipment or payment.
• Collection log: record who copied each item, when, from which device or account, and how. Keep original filenames and folder structure where practical. Note the displayed time zone rather than silently converting message times.
• Working index: assign each record a reference number and describe the fact it may help establish. Keep explanations, translations and highlighted working copies separate from the preserved source material.

Possible China-Side Options

• Start with preservation, not editing. Use authorised export or backup functions where available, retain access to the original records, and keep a protected master copy plus a separate backup. Check that attachments and voice messages remain accessible; a file existing on disk does not establish that it is complete or readable.
• Build a short chronology. List the order, payment, agreed delivery date, changes, complaints and responses, then reference the underlying records. Preserve messages that appear inconvenient as well as helpful ones; a selective narrative is not a substitute for a complete record.
• Ask about formal preservation when records may disappear or authenticity is likely to be disputed. Depending on the circumstances, counsel may assess notarisation, technical examination or an application for court evidence preservation. Article 94 gives specified treatment to certain electronic records and notarised content, subject to rebuttal; it does not make notarisation mandatory for every message. Source: https://www.court.gov.cn/zixun/xiangqing/212721.html
• Plan presentation separately from preservation. Article 17 requires Chinese translations for foreign-language documentary evidence or explanatory materials submitted to a people's court. Confirm the applicable submission format and translation requirements with counsel or the receiving court; do not assume the same procedure applies to every arbitration or initial consultation. Source: https://www.court.gov.cn/zixun/xiangqing/212721.html

Risk Factors

• Replacing or resetting a phone, deleting a mailbox, losing an employee's account access, or allowing attachments to expire can remove context that screenshots do not reproduce. Preserve before routine IT changes where a dispute is anticipated.
• Cropping, annotating or compressing the only copy makes later comparison harder. Redact or annotate separate working copies when needed, while retaining the unaltered source securely and limiting access to people with a legitimate role.
• Preservation does not cure unlawful collection, prove the sender's authority, establish breach, or guarantee recovery. Do not access another person's account without authorisation or publish private conversations online to pressure the counterparty.
• Time stamps, file hashes or a storage service can assist record management, but should not be presented as an automatic guarantee of authenticity or admissibility. The disputed facts and the receiving forum still require assessment.

Next Step

Prepare a concise transaction summary and an evidence index before requesting advice. Explain which original accounts and devices remain available, which records may soon be lost, and whether any court or arbitration deadline has already been set. Do not wait for a perfect archive before seeking help about an urgent deadline. For an initial discussion, use HAIYU's contact page: https://www.haiyulaw.com/contact . Agree an appropriate secure channel before sharing confidential files. This guide provides general information, not advice on a particular dispute; it does not promise acceptance of evidence, representation or any result. Sources checked on 26 October 2026.