Two digits on a W-2 survive every downstream check most lenders run today
Mortgage processors, auto-loan underwriters, and tenant-screening agents trust the W-2 the applicant brings as primary income proof. The IRS rarely sees the PDF; the lender does. When the applicant edits Box 1 (Wages, tips, other compensation) before uploading, the wrong figure is the figure the file is built on.
HTPBE? analyzes the structural layer of the PDF file — the layer that records every edit, even invisible ones. We don’t inspect holograms, phone photos, or ID biometrics. If your fraud problem is a digitally altered or fabricated W-2, we’re the most specific tool for it.
When HTPBE? returns INCONCLUSIVE on a W-2, that’s itself a fraud signal in this context — real W-2 exports always come from a US payroll system, never from a desktop tool.
The problem
Modern document fraud is invisible to visual review
A growing class of document fraud opens a genuine PDF, edits a balance, a date, or a beneficiary, and re-saves it. Visually nothing changes — the document passes pixel-level review, layout review, and KYC.
Structural PDF analysis reads the layers rendering engines never expose: revision history, object structure, signature coverage maps. That is where edits leave fingerprints they cannot wipe.
Common tampering patterns
- Modified balances or totals after export
- Swapped IBAN or beneficiary on invoices
- Post-signature edits on contracts
- Backdated issue and modification dates
- Fabricated documents from consumer PDF tools
What this looks like
How fake and tampered W-2 PDFs actually look
Three real fraud mechanics we catch at the structural PDF layer.
Real W-2 edited after employer issuance
Authentic W-2 comes from a US payroll system (ADP, Paychex, Gusto, QuickBooks Payroll, Workday, Rippling, BambooHR Payroll, Square Payroll, Justworks). The applicant downloads it, opens it in any PDF editor or spreadsheet, edits Box 1 (Wages) or Box 5 (Medicare wages), exports as PDF. The producer field changes from the payroll engine to whichever editor was used.
W-2 fabricated in Word from a template
A W-2-shaped PDF authored in Word using the IRS form layout copied from screenshots, populated with a desired employer and Box 1, exported. The producer is Microsoft Word; the structured payroll-system metadata authentic W-2s carry is missing entirely.
Box arithmetic broken after edit
When Box 1 (Wages) gets edited up, the dependent boxes — Federal income tax withheld, Social Security wages, Medicare wages, state wages — usually do not get touched. The arithmetic relationship breaks. Combined with structural edit markers, the verdict is unambiguous.
The scale
Why your existing checks miss this
Day 1 Certainty checks the data with the source. It does not cover every borrower or every doc.
Both layers matter. The PDF the borrower uploaded is what your underwriter opens.
Fannie Mae Day 1 Certainty and Freddie Mac AIM check income data with payroll providers when the borrower’s employer participates and the borrower consents. Coverage is partial — many employers and borrowers fall outside. VOE services call the employer directly, but that step is downstream and slow. Equifax and credit bureaus check identity and credit, not document integrity. HTPBE? catches the W-2 PDF the borrower uploaded at the moment of intake — standalone, no IRS API, no payroll-provider integration required.
What HTPBE? checks
Detection capabilities
Deterministic structural signals. No probabilistic scores, no model training.
Producer signature mismatch
Authentic W-2s carry the producer signature of US payroll software. When the producer is Microsoft Excel, Microsoft Word, LibreOffice, Chrome Headless, or a generic PDF library, the document was edited or fabricated on a desktop — it did not come fresh from the payroll engine.
Incremental update trail
A clean payroll export has one cross-reference table. Re-saves through any editor append a second xref — visible structural evidence of post-issuance editing.
Box arithmetic fraud detection
The relationship between Box 1, Box 2 (Federal income tax withheld), Box 3 (Social Security wages), Box 5 (Medicare wages), and state wages is checked row by row. Edited boxes break the chain unless every dependent field is also adjusted.
Modification timestamp gap
A real W-2 issued by January 31 has CreationDate ≈ ModDate. A months-later modification on a "freshly issued" W-2 is a high-confidence flag for post-export editing.
Font subset divergence across pages
Multi-session edits leave font subset prefix shifts. Single-session legitimate exports have consistent subsets across all pages.
Image-stream artefacts in fabricated W-2s
Fabricated W-2s often paste the IRS form layout from screenshots. Pasted image streams carry different compression characteristics than authentic embedded forms — a structural fingerprint of fabrication.
Share with engineering
Wire this into your intake pipeline in under a day
Two API calls — one POST to submit the PDF, one GET to retrieve the verdict. Forward this page to your engineering team; the full API reference, quotas, and copy-paste examples in cURL, JavaScript, Python, PHP, Go, and Ruby are one click away.
Pricing
Self-serve plans, no sales call
All plans include the same forensic checks. Pick the quota that matches your monthly document volume.
manualStarter
$15/mo
30 checks/mo
Manual spot-checks and integration testing
most commonGrowth
$149/mo
350 checks/mo
Active document processing pipelines
high volumePro
$499/mo
1,500 checks/mo
High-volume automation and API integrations
Enterprise (unlimited, on-premise available) — see full pricing
API key on signup. Free test environment on every plan. No card required.
Customer Stories
Teams that stopped document fraud
Compliance, finance, and risk teams use HTPBE? to catch manipulated PDFs before they become costly mistakes.
Caught an invoice where the total had been changed by less than a thousand dollars. Without this I would have approved it without a second look.
Sarah M.
AP Manager
United States
We had three applicants in the same week with bank statements that looked completely fine. Two of them were flagged as modified. You simply cannot see this by reading the document — it is in the file structure.
Lars V.
Risk Analyst, Online Lending
Netherlands
Salary slips were coming with altered figures. We identified two problematic files before the placement was finalised.
Priya K.
HR Operations Lead
India
Since we started checking documents this way, we stopped two applications early in the process that would have been very difficult to reverse later.
Julien R.
Fraud Analyst, Fintech
France
Some applicants were sending PDFs that looked authentic but had been edited in ways not visible to the eye. We now ask for checked originals when something is flagged. Already saved us from a few bad decisions.
Marta S.
Compliance Coordinator
Spain
One invoice was caught because there was a mismatch between the document dates and structure. That particular case would have cost us significantly.
Tariq A.
Finance Manager
United Arab Emirates
FAQ
Frequently asked questions
Does HTPBE? work with W-2s from any US payroll provider?
Does this replace Fannie Mae Day 1 Certainty or Freddie Mac AIM?
Can it catch W-2s fabricated entirely from scratch in Word?
modified or inconclusive with producer-mismatch and missing-metadata flags.What about W-2s from IRS Get Transcript?
What does an INCONCLUSIVE verdict mean for a W-2?
Secure your workflow
Create your account — API key on signup, free test environment on every plan.
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