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Prepare a WhatsApp export without losing the original evidence trail
A practical preparation pack for people handing a chat export to a lawyer, immigration adviser, investigator or other decision-maker. Preserve the native file, document every change, and disclose the limits instead of presenting a converted PDF as magic proof.
Version 2026.07 · reviewed 13 July 2026 · synthetic examples only
Inside the pack
- Preservation checklist
- Evidence index
- Custody log
- Redaction log
- Relationship timeline
- Handover checklist
- SHA-256 record
- Source notes
The core distinction
Original, working copy and presentation copy are not the same thing
The original is the native file produced by WhatsApp and kept unchanged. A working copy is where selection, conversion and redaction happen. A PDF or printed exhibit is a presentation copy. Keeping those layers separate makes it possible to explain exactly what changed and to return to the source when context is disputed.
Preserve unchanged
Original export
Native ZIP/TXT, backed up and hashed.
Document every change
Working copy
Selection, naming, annotation and redaction.
Make it readable
Presentation copy
Indexed PDF or bundle prepared for the recipient.
Five-step workflow
A defensible preparation process starts before conversion
The templates turn these steps into a record someone else can follow. They are deliberately neutral: the aim is transparency, not making the material look stronger than it is.
- 1
Preserve the native export
Use WhatsApp’s own Export Chat function, save the original ZIP or TXT unchanged, back it up, and record who exported it, when, from which device and with which time zone.
- 2
Hash and log the original
Calculate a SHA-256 value for the untouched file and start the custody log. A later matching hash supports byte-for-byte integrity; it does not establish authorship, truth or completeness.
- 3
Work only from a copy
Convert, select, annotate or redact a duplicate. Keep enough surrounding messages to preserve context and log every intentional omission.
- 4
Index the handover bundle
Assign stable item IDs, state the date range and participants, disclose gaps or missing media, and link every timeline entry to its source item.
- 5
Confirm the recipient’s rules
Ask the lawyer, court, investigator, employer or caseworker what format and evidence they require. Requirements differ by country, forum and matter.
Downloadable files
Use the whole pack or only the template you need
Keep the original native export separate from every working copy.
Give each source, extract and exhibit a stable ID with dates and limitations.
Record exports, copies, transfers, custodians and receipt references.
Disclose each omission or redaction without exposing the removed information.
Map events and periods to representative supporting records.
Package files, context, limitations and access details clearly.
Record a repeatable hash for the exact bytes of the preserved file.
See the sources, methodology and important limits behind the pack.
What this pack cannot prove
A hash and custody log can help document file integrity and handling. They do not prove who authored a message, that a conversation is complete, that every statement is true, that collection or disclosure was lawful, or that the material is admissible. Do not call an output “authenticated,” “certified,” “forensic” or “court-ready” unless a qualified person has actually established that status.
Why “representative and indexed” matters
Current UK Visas and Immigration caseworker guidance says evidence must be considered in the round and gives more weight to official, verifiable records. It also says WhatsApp and social-media interactions can be difficult to verify. That makes a chat export supporting context—not a substitute for official records such as joint financial, housing or identity evidence where those are relevant.
The pack therefore helps you disclose the source, selection method, gaps and alterations. It does not encourage dumping thousands of pages or pretending weak evidence becomes strong because it has attractive formatting.
Keep the source. Disclose the process. Make the handover easier to review.
Download every template in one small ZIP. No form, email gate or customer data.
Download the free evidence packNeed a readable working copy? Preview a formatted PDF—but preserve your original export first.