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How to Apply for an iD-One Account

Onboarding guide for signers who need to create a new iD-One digital identity

Answer

iD-One is a digital identity issued by TradeLink, backed by a PKI Class 12 certificate from Digi-Sign — the only commercial Recognized Certification Authority under Hong Kong's Electronic Transactions Ordinance (ETO). You need an iD-One account to sign identity-verified documents using the iD-One method in Foxit eSign.

When Do I Need This?

You will be prompted to apply for iD-One when:

  • You try to sign a Foxit eSign document that requires identity verification
  • You enter your email address and it is not found in the iD-One system

When this happens, the signing screen will show an Apply for iD-One button. Clicking it starts this process.

What You Need
  • A smartphone (iOS or Android) to install the Tradelink Sign app
  • A valid Hong Kong ID or passport for identity verification during the application
  • The email address you will use as your iD-One registered address
  • The activation code and email pre-filled by Foxit eSign (provided automatically when you click Apply)
Step-by-Step: Applying for iD-One

Step 1: Click "Apply for iD-One" in Foxit eSign

On the signing screen, click Apply for iD-One. You will be redirected to the iD-One application page. Your activation code and registered email are pre-filled — do not change these values.

Step 2: Download the Tradelink Sign app

On the application page, scan the QR code using your phone's camera to download the Tradelink Sign app from the App Store (iOS) or Google Play (Android). You can also search for "Tradelink Sign" directly in the store.

Step 3: Open Tradelink Sign and enter your activation details

Launch the app and tap Apply for iD-One. Enter the activation code and email address exactly as shown on the application page in Foxit eSign. Both fields are pre-generated and unique to your registration — do not modify them.

Step 4: Complete identity verification in the app

Follow the in-app instructions to complete your ID-Cert Class 12 application. This includes scanning your identification document and completing a liveness check.

 

Step 5: Wait for approval

Once you submit your application in Tradelink Sign, you will receive a confirmation email. Processing typically takes 1–2 business days. You will be notified by email when your iD-One account is activated.

Step 6: Return to Foxit eSign to sign

Once your iD-One account is active, return to the original signing link in your envelope invitation email. Select iD-One, enter your registered email, and complete the OTP verification to sign.

 

Already Completed the Application?

If you have already completed the application steps in Tradelink Sign and are waiting for your account to be activated, click the Already completed the application on Tradelink Sign? link on the application page. You will be redirected back to Foxit eSign to continue once your account is active.

You can also check the status of your iD-One application by opening the Tradelink Sign app. A notification will be sent to your registered email when your account is ready.

After Your Account Is Activated

Once your iD-One account is active, you can:

  • Return to any pending Foxit eSign envelopes and sign using iD-One
  • Use iD-One for future envelopes from any sender that enables TradeLink identity verification
  • Manage your iD-One account via the Tradelink Sign app

 

Frequently Asked Questions

Q: How long does iD-One approval take?

A: Typically 1–2 business days after you complete the in-app application. You will receive an email when your account is ready.

Q: What is a PKI Class 12 certificate?

A: It is a Personal (Remote) ID-Cert issued by Digi-Sign, a wholly-owned subsidiary of Tradelink and the only commercial Recognized Certification Authority under the ETO in Hong Kong. It enables legally binding digital signatures.

Q: Can I use the same iD-One account for multiple envelopes?

A: Yes — once your account is active, you can use it to sign any number of Foxit eSign envelopes that require iD-One identity verification.

Q: What if I lose access to my registered email?

A: Contact TradeLink support to update your registered email address. You will need to verify your identity to make this change.

Q: Is Tradelink Sign free to download?

A: Yes — the Tradelink Sign app is free to download from the App Store and Google Play.