Certification authority of the A3 ecosystem
Electronic signatures and powers of attorney for A3 services
Apply in A3.ID, pass identity verification online and receive a signature file protected by your own password. Any signature or power of attorney can be checked by its serial number.
- 1 yearsignature validity
- PKCS#12.pfx file under your password
- Onlineidentity verification without a visit
- OCSP and CRLcertificate status in real time
What the authority issues
A signature confirms that you signed a document and that it has not changed since. A power of attorney lets an employee or another person act on the principal’s behalf for a set period.
Electronic signature
A signature key certificate for individuals, sole proprietors and organizations. Valid for one year and kept in a .pfx file under your password.
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Digital power of attorney
Lets an attorney act on behalf of the principal for a set period. Issued as XML, PDF and a printable form with a verification link.
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Identity verification without visiting an office
Before issuing a signature or a power of attorney, the authority confirms that the applicant is the owner of the identity document. Everything happens online, and an administrator decides on every application.
- An identity document: passport, ID card, driving licence or residence permit
- Biometric verification in an external identification service: the document and the face are matched automatically
- Organizations and sole proprietors attach organization documents: up to 10 PDF files of 10 MB each
- An administrator of the authority reviews the application and approves the issue
Where the signature is valid
An A3.CA signature confirms the author and the integrity of documents in A3 ecosystem services. The parties recognise it under a contract between them, as allowed by Article 7(3) of the Law of the Republic of Kazakhstan “On Electronic Document and Electronic Digital Signature”. It is not a certificate of an accredited certification authority, so government portals require a signature from the National Certification Authority of Kazakhstan.
Certification authority regulationCheck a signature or a power of attorney by number
Enter the serial number and the service shows the owner, the validity period and the status: valid or revoked. No sign-up is needed.
Questions and answers
What is an A3.CA electronic signature?
It is a signature key certificate issued by the certification authority of the A3 ecosystem. It is used to sign documents in A3 services such as A3.EDM. The signature comes as a .pfx file (PKCS#12) protected by your password.
How long is a signature valid?
One year from the date of issue. To keep working after it expires, submit a new application in A3.ID.
Who can get a signature?
Individuals, including the self-employed, sole proprietors and organizations. Sole proprietors and organizations attach company documents to the application.
Do I need to visit an office?
No. Identity verification takes place online in an external biometric identification service, and an administrator of the authority reviews the application.
How do I revoke a signature or a power of attorney?
Send a revocation request in your A3.ID account and confirm it with the codes from the SMS and the email. After confirmation the document gets the “Revoked” status.
Can I use the signature on government portals?
No. An A3.CA signature is valid in A3 ecosystem services and is recognised by the parties under their contract. Government portals of Kazakhstan require a signature from the National Certification Authority.
Works together with
Shall we issue a signature for your work in A3?
Applications are submitted in A3.ID. You will need an identity document and a phone with a camera for verification.