The administration offers a variety of administrative services for citizens and businesses, including personal documents, company registration, address registration, certificates and permits, as well as liability check services.
Frequently asked questions
Answers to the most common questions about administrative services.
23 questionsGeneral questions
You can submit an application at the administration office or online when the service is available. You need identification documents, a completed application and applicable fees.
Complaints can be submitted in writing at the administration registry or electronically through the online portal with a detailed description and contact details.
Submit an application with the required registration documents and pay the applicable fees, including registration of the management address and other legal requirements.
You need an application and an identity document. Online submission may be available with a qualified electronic signature.
You can check the status in the administration online system using the application number or by contacting the administrative office.
Yes, the administration offers electronic services through the online portal. Some services require an active electronic signature.
Submit an application with updated data and supporting documents. The procedure may also be available online when supported.
Fees are defined by the administration ordinance. Payment can be made in cash, by bank transfer or electronically through the platform.
Working hours and contacts are published in the Contacts section of the respective administration website. You can also use online question and signal forms.
KAO Mobile
- Install KAO Mobile on your iPhone.
- Open KAO.bg on a computer where you can use your qualified electronic signature (QES).
- Sign in to KAO.bg with your QES.
- Open: Profile → Mobile devices.
- Select: "Add device".
- An activation QR code will be shown on screen.
- Open KAO Mobile and select: "Activate device".
- Scan the QR code.
- After successful activation, the device will be linked to your KAO profile.
KAO uses QES for reliable initial identity verification.
The mobile app does not create a separate profile with username and password.
After successful identification on KAO.bg, the specific mobile device can be registered as a trusted device.
No.
After successful activation, KAO Mobile uses the registered device and a secure authentication mechanism.
On supported devices you can use Face ID or Touch ID to confirm access.
No.
Face ID and Touch ID are used only for local confirmation of access to the registered device.
They are not a qualified electronic signature and do not replace QES for operations that require qualified electronic signing.
No.
Biometric verification is performed locally by the device operating system.
KAO does not receive or store the biometric template used by Face ID or Touch ID.
Yes.
You can register more than one supported mobile device to your KAO profile, within the allowed limit for active devices.
Each device is activated separately.
The new device must be activated separately.
Sign in to KAO.bg with QES and open: Profile → Mobile devices → Add device.
Then scan the new QR code with KAO Mobile on the new device.
The old device does not automatically transfer its trust to the new one.
Sign in to KAO.bg as soon as possible and open: Profile → Mobile devices.
Select the lost device and remove it.
After removal, KAO revokes the registered device's access to your profile.
Sign in to KAO.bg and open: Profile → Mobile devices.
Select the device and use "Remove device".
Make sure that:
- the QR code is fully visible on screen;
- the phone camera has permission to be used;
- you use the scan function in KAO Mobile;
- the QR code has not expired.
Activation QR codes are valid for a limited time.
If the code has expired, generate a new one from: Profile → Mobile devices → Add device.
Generate a new QR code from KAO.bg.
You do not need to change your profile or register again.
Sign in with QES and open: Profile → Mobile devices → Add device.
Some electronic administrative services require the application to be signed with a qualified electronic signature before submission.
Qualified signing directly from KAO Mobile is only available for supported services and available electronic signing providers.
When a service cannot be completed from the mobile app, KAO will inform the user before submission.
For technical support and questions about KAO Mobile, contact us at:
You can also review the KAO Mobile section in the frequently asked questions.