Trust in digital certificates

ZertCheck – Create digital certificates in seconds and verify them securely against forgery.

With ZertCheck, organizations can create individual credentials or certificates at the push of a button – with or without their own document. A credential can be shared as a link or PDF, and its authenticity can be verified online at any time, even after expiration or revocation.

A single scan is enough – the verification output confirms the recorded data (e.g. person, title, period) and shows the status (valid, expired or revoked).

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How ZertCheck works

So funktioniert ZertCheck

What ZertCheck is used for

ZertCheck is already in productive use – for digital course certificates with QR code verification at Campus3.

During verification, it is shown whether the document details match the data stored in ZertCheck and what the certificate’s status is.

Typical real-world use cases.
Course and continuing education certificates
Participation confirmations and certificates with QR codes that can be verified online at any time – even years later. Status is visible instantly.
Employment references & interim certificates
Employment references remain in the HR system or as PDFs. ZertCheck ensures independent authenticity verification without storing content.
Confirmations & individual certificates
From volunteer hours and role or activity confirmations to internal attestations: anything that needs to be verifiable can be clearly verified with ZertCheck – including digital membership cards as well as donor or supporter confirmations.
ZertCheck is not limited to a document type – but to verifiable certificates.

The problem

Everyone occasionally needs a verifiable certificate – reliable, digital and with minimal effort. Traditional PDFs offer little security: with today’s tools, content can easily be modified or recreated.

The solution with ZertCheck

With ZertCheck, certificates can be created or imported effortlessly. Each entry includes a unique link, a PDF and a QR code for online verification at any time.

Make employment references secure and verifiable

Employment references are usually sent as PDFs by email and can easily be copied or altered. With ZertCheck, the document stays in your HR system while its authenticity is verified via an independent link.

  • Create the reference as usual in the HR system (Word, HR software, PDF tool …)
  • Register the ZertCheck token for person, period and role
  • Place the QR code or token on the PDF
  • The status can be checked at any time via link or scan

ZertCheck stores only the core data required for verification (person, organization, period, document type, status) – no content or internal assessments.

Benefits for HR & organizations
  • Fast authenticity checks without own infrastructure
  • Clear status display: valid, expired or revoked
  • Swiss hosting with clear data protection rules
  • Ideal for internships, interim confirmations and training records

Typical areas of use

Education & continuing training
Courses, seminars, certificates, examinations
Associations & engagement
Memberships, volunteering, social records
Compliance & occupational safety
Trainings, licenses, recertifications
Ownership & value records
Art, equipment, vehicles, project results
Companies & HR
Employment references, internship and training confirmations, internal training

Why ZertCheck?

Forgery protection
Unique tokens and server-side verification. Certificates can be revoked or time-limited at any time. All certificates are cryptographically versioned and technically ready for future blockchain anchoring.
Data protection
Only the data required for verification. No document content or wording.
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Swiss operation
Hosting and development entirely in Switzerland.
Instant verification
Status accessible with a scan or click – without media disruption.
Automatable
REST API for single or bulk issuance directly from your system.
Full traceability
Valid, expired or revoked – changes are transparently visible.

FAQ

Who can use ZertCheck?
ZertCheck is intended for organizations such as companies, schools, associations and authorities. Private users are not intended.
What information is stored?
Only the core data required for verification: organization, period, document type, status. No document content or wording.
Can a credential expire or be revoked?
Yes. Credentials can be time-limited or deactivated at any time.
For which purposes is ZertCheck suitable?
Applications, course confirmations, employment references, community service records, tenancy confirmations, compliance records and many other everyday verifications.
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Data protection & legal

Ready to test?

Examples of typical status messages.

Valid certificate
Show PDF
Expired
Show PDF
Revoked
Show PDF
Invalid token
Show