Sign with Singpass
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  • START HERE
    • Overview of Sign
    • How do our Digital Signatures work?
    • Frequently Asked Questions
  • FOR USERS
    • How to sign
    • Verifying Sign with Singpass Signatures
      • Loading Singpass Root Signing Certificate
  • FOR RELYING PARTIES
    • Use Cases
    • Getting Started
      • How to Onboard our API
      • Digital Signing Partners
        • Docusign
        • Tungsten Automation
        • OneSpan
        • Tessaract Technologies Pte Ltd
        • Netrust Pte Ltd
        • Modus Consulting
        • Redoc.co by Real Estate Doc Pte Ltd.
        • CrimsonLogic
        • Zoho Sign
        • Securemetric Technology Pte. Ltd.
        • Rently Pte. Ltd.
    • API Documentation
      • Document Signing V3
        • Initiate Sign Request
        • Redirect From Sign with Singpass
        • Accept Success Signing Webhook
        • Get Signing Result
        • JWKS Specification
        • Sign Portal
      • Document Signing V1
      • Transaction Signing
        • Embedding Singpass JS
        • Init Transaction Signing
        • Exchange Transaction Signature
    • UX Guidelines
      • User Journey Illustration
    • Support
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  1. FOR USERS

Verifying Sign with Singpass Signatures

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Last updated 3 months ago

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Sign with Singpass signatures can be verified using PDF reader software, such as Adobe Acrobat Reader application ().

Please ensure that the document has not been modified since your signature has been created, as this will invalidate the signature.

Verifying signatures

Please follow the steps below to verify a Sign with Singpass signature.

1

Open up signed document on Adobe Acrobat Reader

2

Check if green tick with "Signed and all signatures are valid"

If you see "Certificate validity is unknown", this is because you do not have the Singpass root signing certificate on your device. Please refer to this to install the Singpass root signing certificate.

3

Go to signature panel

In signature panel, each signature should show:

  • Document has not been modified

  • Signer's identity is valid

  • The signature includes an embedded timestamp

  • Signature is long term validation (LTV) enabled

Document owner should "click to view this version" to visually inspect that the contents of the document version is signed correctly.

4

Right-click on each signature and select "Show Signature Properties".

Select "Show Signer's Certificate".

Certificate should include the following:

  • Singapore National Root CA - B1

  • Singapore NDI Intermediate CA 1 - B2

  • Signer's full name (as per NRIC)

Click the full name and then "details".

Check under "Subject" that signer's name and last 4 characters of NRIC is correct.

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