Exact document file
The approved PDF, DOCX, XLSX, PPTX, PNG, JPEG or text file is used to calculate its SHA-256 fingerprint.
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DOC verification category
Let recipients confirm that a document has not changed
Document seals let a recipient compare a local copy with the approved fingerprint without retaining the uploaded comparison file. Choose integrity-only, verified issuer or a high-security approved issuance workflow.
3 available seals
✓
Exact-file fingerprintA SHA-256 fingerprint identifies the exact approved file rather than only its filename.
✓
Private comparisonRecipients can compare a copy without the verification service retaining that comparison upload.
What is reviewed
Evidence and information used for verification
Document authentication is based on the exact file fingerprint. Issuer identity and approval workflow depend on the assurance level selected.
Document metadata
Title, category, reference and issue information help a recipient identify the intended record.
Issuer identity when required
Verified Issuer and High Security products also connect the fingerprint to an approved organization.
Why use this category
Benefits designed for documents
Exact-file fingerprint
A SHA-256 fingerprint identifies the exact approved file rather than only its filename.
Private comparison
Recipients can compare a copy without the verification service retaining that comparison upload.
Issuer options
Add verified organization identity when recipients need to know who issued the document.
Flexible workflows
Support manual, automatic, trusted-organization and reseller/API approval paths.
Available seals
All seal designs
Choose your level of verification
Open any seal to see its exact checks, requirements, availability, limitations and current design.
Live design preview
Document verification
Standard Security
Document Integrity
Document Integrity VerifiedConfirms that an uploaded document exactly matches the approved SHA-256 fingerprint.
See this seal and what it verifies →
Live design preview
Document verification
Standard Security
Verified Issuer Document
Verified Issuer DocumentConfirms the exact document fingerprint and the verified identity of its issuer.
See this seal and what it verifies →
Live design preview
Document verification
High Security
High Security Document Authentication
High Security Document VerifiedHigh-security document fingerprint authentication issued through an approved workflow.
See this seal and what it verifies →
How it works
From application to live verification
Product requirements can vary, but every category follows a clear path from submitted information to a public status record.
Designed forCertificate issuersTraining providersProfessional firmsOrganizations distributing official documents
- 1Select an assurance level
Choose integrity, verified issuer or High Security authentication.
- 2Record the fingerprint
The approved document is fingerprinted with SHA-256; the temporary file is not retained.
- 3Share the verification
Place the seal or verification link with the document so recipients can compare a copy.
Where to use the seal
Put verification where customers make trust decisions
The live certificate remains the source of truth. These placements make it easier for a visitor to find and open it.
Inside the document
Place the seal image or verification link on a cover, certificate or final information page.
Download page
Show verification beside the exact file offered to the recipient.
Issuer portal
List issued documents with links to their live records and current status.
Delivery email
Include the verification link when sending a certificate, report or formal document.
Common questions
Understand the verification scope before applying
Every seal page also explains its exact checks, requirements and important limitations.
Is the comparison copy stored?+
No. The recipient upload is fingerprinted for comparison and the temporary file is not retained by the verification workflow.
Why does a tiny document change fail verification?+
Any byte-level change creates a different SHA-256 fingerprint. The comparison confirms an exact file match, not visual similarity.
Does a document seal prove the content is legally valid?+
No. It confirms the exact fingerprint and issuer information shown; it does not decide whether the content is legally enforceable or factually correct.
Ready to compare?