Insurance fraud: what a file’s provenance settles, and what it leaves to the adjuster
Claim disputes turn on submitted media — photographs of damage, video of a scene, invoices and estimates, and the timestamps attached to all of it. A forensic examination reconstructs how those files were produced and whether that chain matches the account given. It does not reach the event the files depict, and the distance between those two things is where these opinions succeed or fail.
- QUESTION
- How the file was produced, and when
- CORE ARTIFACTS
- EXIF · container · device clock
- CLOCK
- Portals re-encode; originals get deleted
- USUAL POSTURE
- Coverage action · SIU referral
- DELIVERABLE
- Report, then Rule 26 disclosure
- ROLES
- Testifying · Consulting · Neutral
In a contested claim the forensic record normally establishes what device and software produced a file, whether its internal structure is consistent with that origin, what the recording device believed the time and place were, and whether the file was edited after capture. It does not establish that a loss was staged, that a photograph shows the insured property, or that an edited file is a fabricated one — those are conclusions for the adjuster, the investigator and the factfinder.
What is actually in dispute
The claim file asserts that a particular thing was damaged, at a particular time, in a particular way — and the digital evidence offered for that is almost always a set of files whose provenance nobody has checked.
Insurers reach a forensic examiner from two directions. A special investigations unit has a claim that does not sit right and wants to know whether the submitted media supports the narrative. Or a coverage action is already filed, the insured has served an expert on authenticity, and someone has to test that opinion. Both arrive as an authentication question, and authentication in the technical sense is narrower than the word suggests: it asks whether a file is what it purports to be, not whether the story around it is true.
The distinction does real work. A staged-loss theory is a reconstruction built from many sources — the claim history, the physical inspection, the repair estimate, the timing of policy inception — of which the file examination is one input. An examiner who supplies that input precisely, with its limits attached, gives the investigator something to build on. An examiner who supplies a conclusion about the loss has substituted their own judgement for the factfinder’s on the one question they were not asked.
Where these matters come apart
Two recurring failures account for most of the trouble. The first is treating any evidence of editing as evidence of fabrication: the modern capture pipeline edits everything. A phone photograph is computationally assembled from multiple exposures, tone-mapped and re-encoded before it is ever saved, and it is re-encoded again by every messaging app, every upload form and every document management system it passes through. Editing markers are the normal condition of a claim photograph.
The second is treating a single metadata field as decisive. Fields disagree with each other constantly and for innocent reasons, and a report that rests on one of them has built the whole opinion on the weakest available foundation.
Which artifacts bear on it
The centre of gravity here is not the operating system but the file itself, read alongside whatever device or account records can be obtained to corroborate it.
Inside the file
EXIFcarries the camera make and model, lens and exposure parameters, software strings, orientation, an embedded thumbnail and — when the device wrote one — a position fix. Below that, the container tells a second story that is harder to edit convincingly: JPEG quantisation tables and the ordering of markers, MP4 atom layout and encoder identifiers, and the way a particular manufacturer’s pipeline structures its output. When the EXIF names one camera and the container structure is characteristic of an image editor, that is a finding that does not depend on trusting the metadata.
Where files carry a C2PA provenance manifest — still uncommon on consumer devices, and increasing — the signed chain records capture and each subsequent edit. A valid manifest is strong corroboration. An absent one means only that nothing in the chain wrote one.
Around the file
A file that arrived on a computer carries the operating system’s own record of its arrival: browser download records on Windows, LSQuarantine on macOS naming the application and source URL a file came from, and Spotlight metadata preserving attributes that survive a copy. Master file table and change journal entries date creation and renaming at file level, and internal inconsistency between the two timestamp sets NTFS maintains is the recognised signature of timestamp manipulation. Where the claimant used cloud photo storage, the sync client databases record when a file first appeared in the account, which is a timestamp the claimant did not write.
The device clock
Every dispute about “when” eventually becomes a dispute about clocks. Clock drift, manual resets, battery exhaustion, time zone handling that differs between the EXIF date fields and the file system MACB times, and the ordinary effect of copying a file all produce discrepancies that mean nothing. A date becomes evidence when a second, independently controlled source agrees with it — a carrier or cloud upload record, a network timestamp, a second device present at the same event.
What this evidence cannot establish
- That the photograph shows what the claimant says it shows. Provenance analysis reaches the file, not the scene. A structurally sound image of undamaged property photographed at a different address is indistinguishable, on its metadata, from a sound image of the insured loss.
- That an edited file is a fabricated event. Cropping, rotation, resizing, tone adjustment and re-encoding are the normal life of a claim photograph. Editing is a finding about the file’s history and carries no implication about honesty without something else attached to it.
- That a location tag places the device where it says. A recorded fix reflects what the device computed from the signals it had, with error that ranges from metres to hundreds of metres, and it can be cached, absent, stripped, or written by software after capture. It corroborates an account; it does not independently establish one.
- That the absence of metadata means concealment. Platforms strip EXIF as a default privacy behaviour, screenshots carry the screenshot’s metadata, and portals re-encode on upload. Stripped metadata is evidence that a file passed through a normal channel.
- That the claim is fraudulent. Fraud requires intent and a false statement made to obtain a benefit. An examiner reports that a file’s chain does not match the account given, and stops. The characterisation belongs to the investigator, counsel and ultimately the factfinder.
Where the disputed material is synthetic rather than altered — generated video, a cloned voice on a recorded call — the analysis is different and is described on the deepfake forensicspage. Where the originals exist only on a claimant’s phone and the question is extraction rather than authentication, that is covered at mobileforensicexpertwitness.com.
The expert’s role and the deliverable
- Get the originals, not the portal copies. The single decision that determines the quality of everything that follows. Request the files as they exist on the source device or in the source account, hashed at collection, with the transfer method recorded — because emailing them destroys the thing being examined.
- Establish the reference behaviour. What does this make and model of device actually produce? Where the claimed camera can be obtained, exemplar captures taken under controlled conditions give the comparison a measured baseline instead of a general expectation.
- Read the file from the outside in. Container and encoder structure first, metadata second. Structure is a byproduct of the pipeline that wrote the file and is hard to forge coherently; metadata is a set of fields anyone can set.
- Corroborate every date. One clock is an assertion. Two independently controlled sources agreeing is a finding, and the report should name both and state the offset applied to each.
- Write the limits into the opinion. For each conclusion, what it rests on, what would change it, and what it does not reach. In this matter type that last clause is the one that keeps the opinion inside the discipline.
- Rule 26(a)(2)(B) report and testimony. Opinions with basis and reasons, facts and data considered, exhibits, qualifications, a four-year testimony list, and compensation — prepared so that an opposing examiner working from the same files reproduces the result or says where it fails.
The underlying examination is described on the computer forensics page, and how a report is scoped, disclosed and defended on the expert witness testimony page.
Where Rule 702 pressure falls here
Under Rule 702 as amended on December 1, 2023, the proponent must show it is more likely than not that the opinion reflects a reliable application of the method to the facts of the case. Media authentication draws more Rule 702 motions than most forensic subjects, because the field contains genuinely unreliable techniques that are easy to run and produce confident-looking output.
- Error level analysis and its descendants. ELA visualises compression differences and is widely misread as a manipulation detector. It has no established error rate for the compressed, re-encoded images claims actually consist of, and an opinion founded on it is exposed on precisely the reliability factors the rule names.
- Machine-learning detectors offered as the method. A classifier that reports a probability is not self-validating. Its training set, its performance on the compression and resolution of the actual exhibit, and its false-positive rate all become discovery, and a model that cannot supply them cannot support an opinion on its own.
- The manipulation-to-fraud leap. Stating that a file was edited is a forensic finding. Stating that the loss was staged is a conclusion about a person’s conduct that the file cannot carry, and it is the sentence that gets an otherwise sound opinion struck.
- Overread geolocation. Presenting a coordinate as the location of an event, without stating the accuracy of the fix, the possibility of a cached position, or how the tag survived transfer, invites an opposing expert to demonstrate all three.
- Chain of custody over the exhibits themselves. Where the files came from, who handled them, and whether the versions examined hash-match the versions produced. In a matter whose entire subject is provenance, an examiner with a weak custody record for their own exhibits has an obvious problem.
The Daubert Docket collects rulings on digital forensic testimony, the Daubert exposure check walks an opinion against the same failure modes before it is served, and the guide to Daubert challenges to digital evidence sets out the framework.
| RECORD | WHAT IT ESTABLISHES | WHAT IT DOES NOT ESTABLISH |
|---|---|---|
| EXIF fields | What the writing device or software recorded about make, model, exposure, orientation and time | Truth. Every field is editable, and absence is the normal result of passing through a platform |
| Container and encoder structure | Which processing pipeline last wrote the file, often independently of what the metadata claims | Whether the content depicts the claimed event, or who performed the processing |
| Embedded thumbnail | Disagreement between the thumbnail and the full image, which some editing workflows leave behind | Manipulation, where the pipeline regenerated the thumbnail — most of them do |
| C2PA provenance manifest | A signed capture-and-edit chain, where a device or application in the chain wrote one | Anything at all when absent, which on consumer devices is still the usual case |
| GPS position fix | The coordinate the device computed at write time, with the accuracy the signal environment allowed | Where the loss occurred. Fixes can be cached, coarse, stripped, or written after capture |
| File system MACB times and change journal | When the file was created, modified and renamed on this volume, and internal inconsistency where dates were altered | When the content was captured. Copying and exporting rewrite these dates routinely |
| Cloud photo and sync records | When a file first appeared in an account, from a clock the claimant does not control | What the file contained at upload, unless the stored version was preserved and compared |
Questions counsel ask
Can you tell whether a claim photograph has been faked?
The photographs have no EXIF at all. Is that suspicious?
Does the GPS tag prove where the loss happened?
The metadata says the photograph was taken before the date of loss. Have we caught them?
What about tools that claim to detect manipulated images automatically?
Can you work from what the claimant uploaded to the portal?
Related reading
- Deepfake and synthetic media forensics
Where the question is whether a recording was generated rather than edited — what the analysis reaches, and what it does not.
- Computer forensics
Write-blocked acquisition, the artifacts an operating system keeps about a file's arrival, and the three distinctions that bound an opinion.
- EXIF, C2PA and provenance in the glossary
What each term means in the technical sense courts use, and where litigators routinely stretch it past what it carries.
- Can this artifact prove that?
Match a proposition to the records that bear on it, and see where the inference runs out before it is pleaded.
Portal copies are re-encoded and stripped, and the originals live on a device that is replaced every couple of years. Send the matter, the venue, the date of loss, and what form the submitted media is in — a conflicts check and a scoping call follow.
A conflicts check and scoping call follow, normally within one business day. Please do not send privileged or case-sensitive material until conflicts have cleared.
Attorney advertising / expert services. This page describes forensic practice and the procedural rules that govern expert evidence in general terms. It is not legal advice, and it is not a substitute for checking the rules, standing orders, and case law of your own forum. Prior results do not guarantee a similar outcome.