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Preserve evidence safely

Ways to retain messages, records and physical evidence without turning documentation into a condition for being believed or a new source of danger.

In this guide

Safety comes before a perfect record

Do not take a risk only to collect proof

You do not have to provoke a confession, secretly film a dangerous person, return to a location or keep a threatening device. A report or request for help can begin with what you remember; evidence rules and needs vary by process.

Write a factual timeline

Record dates, approximate times, places, what happened, exact words remembered, injuries, witnesses, property damage and steps taken. Mark estimates as estimates and keep later recollections as later additions rather than rewriting the original note.

Store away from the person causing harm

Use a secure account they have never accessed, a trusted person or a lawyer/support service. A hidden folder on a shared device, synced cloud album or household notebook may be discoverable.

Retain common forms of evidence

Messages and online material

Capture the full screen with username, date, time and surrounding conversation; save original files or links where possible; and record the profile URL. Cropped screenshots alone can lose context. Do not keep reopening traumatic material once a safe copy exists.

Calls, accounts and transactions

Keep call logs, voicemails, emails, bank or payment records, location-sharing alerts and account-login notices. Export or download from the original service when a safe option exists, and note who obtained each copy.

Injuries, health care and damaged property

Seek urgent care first. If safe and wanted, photograph injuries over time with date context, keep medical papers, and photograph damage before repair. A lack of visible injury does not mean that violence, sexual harm or coercive control did not occur.

Clothing or physical items

After recent physical or sexual violence, ask a qualified service or police promptly how to preserve possible evidence. Avoid washing or altering items when medically and safely possible, but never delay urgent health care to protect evidence.

Keep the record usable and private

Preserve originals

Keep an unchanged original and work from copies. Note when and how a file was captured, exported or transferred; avoid adding annotations directly to the only copy.

Share the minimum needed

Ask who will see material, how it will be stored and whether identifying details can be redacted for an initial consultation. Do not post evidence publicly when that could expose a survivor, child, address or legal process.

Get process-specific advice

Police, a court, an Internal Committee, a cybercrime report and a protection application may need different information. NALSA or another qualified legal service can help match evidence to the chosen route without promising an outcome.

Words you can use

Asking how material will be handled

Before giving records to an institution or service

“Please tell me which material is necessary, who will have access, how it will be stored, and whether I can provide a copy while keeping the original.”

Sources and publication record

Reviewed and approved by the project team · Sources checked .