Detect edited documents.
See where they were changed.
Sightova checks receipts, invoices, IDs and other document images for edited regions. You get a forgery probability, the share of the document affected and a heatmap of the edit, in seconds.
Available on the Starter plan and above.
- Forged probability97.6%
- Edited area0.9% of the image
- VerdictTampered
- 0–100%
- Forgery probability per document
- Heatmap
- Location of the edited region
- EEA
- Images analysed in Germany and Iceland
- REST
- API on Starter plan and above
Finds the edit, and shows where it is.
The document model scores each image for editing and maps the affected region. C2PA editing history is checked in the same request.
01 · Edited regions
Edited-region detection
Detects regions of a document image that were changed after it was created, such as an amount, a date or a name.
02 · Heatmap
Edit heatmap
Shows where in the document the edit was found, so a reviewer can check that region first.
03 · Credentials
C2PA editing history
A C2PA manifest that records edits in Photoshop, Lightroom or Premiere sets the verdict to tampered.
Output · Score
Forgery probability
A probability from 0 to 100% and a verdict for every document: clean, uncertain or tampered.
Output · Area
Edited area
The share of the document flagged as edited, as a percentage of the image.
Output · History
Scan history
Every scan is stored in your account with its scores and metadata for later review.
Finds edits on receipts, passports and ID cards.
Three photographed documents, each scanned as the original and after one edit: a changed amount, a replaced photo and overwritten text. All three originals were returned as clean. Scanned on the live document model on 10 November 2026; the passport and ID card come from a test set the model was not trained on.
Receipt · amount changed
Original receipt
Photographed receipt, unedited
- Forged probability
- 2.8%
- Verdict
- Clean
Edited receipt
Change amount edited with an AI image editor
- Forged probability
- 97.6%
- Verdict
- Tampered
Heatmap
Where the model found the edit
- Edited area
- 0.9% of the image
- Peak confidence
- 99%
Passport · photo replaced
Original passport
Photographed mock passport, unedited
- Forged probability
- 2.5%
- Verdict
- Clean
Edited passport
Holder's photo replaced
- Forged probability
- 95.4%
- Verdict
- Tampered
Heatmap
Where the model found the edit
- Edited area
- 2.4% of the image
- Peak confidence
- 99%
ID card · text overwritten
Original ID card
Photographed mock ID card, unedited
- Forged probability
- 2.8%
- Verdict
- Clean
Edited ID card
Name, number and dates overwritten
- Forged probability
- 98.0%
- Verdict
- Tampered
Heatmap
Where the model found the edit
- Edited area
- 3.6% of the image
- Peak confidence
- 99%
Receipt from the CORD v2 dataset (CC BY 4.0), edited by Sightova with Qwen-Image-Edit; merchant details were blurred in the dataset. Passport and ID card from MIDV-DM by Smart Engines, based on MIDV-2020 (CC BY-SA 2.5): mock documents with invented details and faces from Generated Photos. Crops and heatmaps by Sightova, shared under the same licences. Every heatmap is drawn from the scan's own output.
Built for government, law enforcement and enterprise.
Document verification with documented findings, in the dashboard or through the API.
Government & public sector
Check receipts, invoices and other documents submitted with claims, grants and applications before they are approved.
- Images analysed in Germany and Iceland (EEA)
- DPA, MSA and subprocessor list published
- Enterprise agreements for agencies
Law enforcement & investigations
Examine document images in fraud cases for edited amounts, dates and names, and see where the change sits.
- Heatmap of the edited region
- Scan history in your account
- REST API for your case tools
Enterprise finance, claims & risk
Screen expense receipts, supplier invoices and onboarding documents before approval or payment.
- One API call per document
- Configurable review thresholds
- Starter plan and above
Integrates with your existing workflow.
Use the dashboard for manual review, or call the REST API from your expense, claims or onboarding systems.
- 01
Submit
Upload a photographed or scanned document in the dashboard, or send it to /detect/document-tampering as a file, URL or base64. JPEG, PNG, GIF and WebP, up to 50 MB.
- 02
Analyse
The document model scores the image and maps where it was edited. C2PA editing history is read in the same request. Results are returned in seconds.
- 03
Review
Apply your own threshold. Route tampered documents to a reviewer with the heatmap, and approve clean ones.
Request
curl -X POST 'https://sightova.com/api/v1/detect/document-tampering?include_heatmap=true' \
-H 'X-API-Key: sk_<your-key>' \
-H 'Content-Type: application/json' \
-d '{"image_url": "https://example.com/receipt.jpg"}'Example response · the edited receipt
{ "request_id": "req_7RnVd2KqW9LmTc4PxYs3B", "endpoint": "/api/v1/detect/document-tampering", "result": { "tampering": { "is_tampered": true, "verdict": "tampered", "forged_probability": 0.98, "max_confidence": 0.99, "mean_confidence": 0.01, "tampered_percent": 0.9, "image_size": [864, 1296], "heatmap": [[0.0, 0.0, 0.0, …], …] } } }
The heatmap is a 256 × 256 grid of edit probabilities over the image.
Processing, retention and contracts.
Where images are processed, what is retained, and the agreements available for review.
EEA processing
Application and database are hosted in Nuremberg, Germany. Detection also runs on a GPU server in Reykjavík, Iceland. Traffic is routed through Cloudflare over TLS 1.2 or higher.
Deleted after analysis
Uploaded images are written to a temporary file during analysis and deleted when the scan completes.
Not used for training
Scanned images are not used for model training. Images are retained only when you submit them as feedback.
Published DPA and MSA
The DPA, MSA and subprocessor list are publicly available for legal and procurement review.
Enterprise agreements
Volume pricing, contract terms and self-hosted deployment can be discussed under an enterprise agreement.
One balance for every check
Document, AI image, explicit content and violence checks share one monthly credit balance, in the dashboard and through the API.
Test Sightova on your own documents.
Request a demo, or start on the Starter plan and run your first document checks today.