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Odaberite sučelje
Odaberite sučelje koje odgovara uslugama koje koristite.
Security and Trust
Security we can evidence.
ISO/IEC 27001, information-intermediary status, GDOR compliance and how we protect data and the service.
Security and Trust
Security we can evidence.
ISO/IEC 27001 information intermediary status, GDPR compliance, and the way we protect data and the service.
Security and Trust
Security we can evidence.
ISO/IEC 27001, information-intermediary status, GDOR compliance and how we protect data and the service.
ISO/IEC 27001
ISO/IEC 27001
ISO/IEC 27001
The information security management system is applied through documented and regularly checked processes.
The information security management system is applied through documented and regularly checked processes.
The information security management system is applied through documented and regularly checked processes.
GDPR compliance
GDPR compliance
GDPR compliance
Data privacy and control are embedded in the workflow.
Information intermediary
Information Intermediary
Information Intermediary
Secure delivery and processing of business documents between systems.
Controlled processes
Controlled processes
Controlled processes
We regularly check and document security controls.
Information intermediary.
Information intermediary.
Information intermediary.
KUPUJ ONLINE d.o.o., the provider of BillKO, appears on the Croatian Tax Administration's official list of information intermediaries.
eINVOICE
COMMERCIAL INVOICE
INVOICE 26-1048
INVOICE 26-1048
Issued 18 Sep 2026 · Due 28 Sep 2026
ISSUER
BillKO
BillKO
PIN 60186252821 · Customer: Kupuj Online d.o.o.
User interface design
User interface design
780,00 €
Monthly technical support
Monthly technical support
180,00 €
AMOUNT DUE
HR00 2026-1048
1.200,00 EUR
1.200,00 EUR
The eInvoice is ready for secure delivery to the customer.
The eInvoice is ready for secure delivery to the customer.
Thank you for your business
billko.eu
CERTIFIED SYSTEM
ISO/IEC 27001
Information security management
SIQ • CERTIFICATE
Certificate for management system
KUPUJ ONLINE d.o.o.
Fiorella La Guardie 13, 51000 Rijeka, Croatia
Development, delivery and maintenance of digital products
Information Security Records, Declaration of Applicability (SoA) 2025, version 1.0 of October 28, 2025
appropriately applies and maintains a management system that meets the requirements of the standard
ISO/IEC 27001:2022
Certificate number
I-0192
Date of certification
2025-10-30
Edition
01 / 2025.10-30
Valid until:
2028-10-30
SIQ Ljubljana · Mašera-Spasićeva street 10, 1000 Ljubljana, Slovenia
CERTIFIED SYSTEM
ISO/IEC 27001
Information security management
SIQ • CERTIFICATE
Certificate for management system
KUPUJ ONLINE d.o.o.
Fiorella La Guardie 13, 51000 Rijeka, Croatia
Development, delivery and maintenance of digital products
Information Security Records, Declaration of Applicability (SoA) 2025, version 1.0 of October 28, 2025
appropriately applies and maintains a management system that meets the requirements of the standard
ISO/IEC 27001:2022
Certificate number
I-0192
Date of certification
2025-10-30
Edition
01 / 2025.10-30
Valid until:
2028-10-30
SIQ Ljubljana · Mašera-Spasićeva street 10, 1000 Ljubljana, Slovenia
CERTIFIED SYSTEM
ISO/IEC 27001
Information security management
SIQ • CERTIFICATE
Certificate for management system
KUPUJ ONLINE d.o.o.
Fiorella La Guardie 13, 51000 Rijeka, Croatia
Development, delivery and maintenance of digital products
Information Security Records, Declaration of Applicability (SoA) 2025, version 1.0 of October 28, 2025
appropriately applies and maintains a management system that meets the requirements of the standard
ISO/IEC 27001:2022
Certificate number
I-0192
Date of certification
2025-10-30
Edition
01 / 2025.10-30
Valid until:
2028-10-30
SIQ Ljubljana · Mašera-Spasićeva street 10, 1000 Ljubljana, Slovenia
GDPR and personal data protection.
GDPR and personal data protection.
GDPR and personal data protection.
BillKO operates in line with GDPR. We maintain compliance and documentation with specialist support from Feralis.
How we protect the service.
How we protect the service.
How we protect the service.
Access control
Access control
Access control
Administrative and data access is limited by role and need.
Administrative and data access is limited by role and need.
Secure communication
Secure communication
Secure communication
Data is transmitted over protected connections.
Data is transmitted over protected connections.
Incident monitoring
Incident monitoring
Incident monitoring
Security events are monitored and handled through an internal process.
Security events are monitored and handled through an internal process.
Backups and recovery
Backups and recovery
Backups and recovery
Service recovery relies on documented backups and procedures.
Service recovery relies on documented backups and procedures.
Suppliers and reviews
Suppliers and reviews
Suppliers and reviews
We regularly review supplier and internal security practices.
We regularly review supplier and internal security practices.
Frequently Asked Questions About Security
The certificate holder is KUPUJ ONLINE d.o.o., the company that provides BillKO. The ISO/IEC 27001 certificate was issued by SIQ.
The ISO/IEC 27001 certificate covers the information security management system of its holder, KUPUJ ONLINE d.o.o., within the scope stated on the certificate itself. The certificate was issued by SIQ. Contact the BillKO team for the exact scope and validity details.
BillKO operates in compliance with GDPR and maintains its compliance and documentation with expert support from Feralis. Access to data is organised by role and need. Details of personal data processing and how to exercise your rights are set out in the Privacy Policy.
You can find the Privacy Policy in the legal section of the BillKO website. Contact the BillKO team for current information about data processors and any documentation you need for an assessment or contract.
If you notice a security issue, contact the BillKO team and indicate that your enquiry concerns security. Briefly describe what you noticed and when; our team will explain how to provide any additional information needed.
Frequently Asked Questions About Security
The certificate holder is KUPUJ ONLINE d.o.o., the company that provides BillKO. The ISO/IEC 27001 certificate was issued by SIQ.
The ISO/IEC 27001 certificate covers the information security management system of its holder, KUPUJ ONLINE d.o.o., within the scope stated on the certificate itself. The certificate was issued by SIQ. Contact the BillKO team for the exact scope and validity details.
BillKO operates in compliance with GDPR and maintains its compliance and documentation with expert support from Feralis. Access to data is organised by role and need. Details of personal data processing and how to exercise your rights are set out in the Privacy Policy.
You can find the Privacy Policy in the legal section of the BillKO website. Contact the BillKO team for current information about data processors and any documentation you need for an assessment or contract.
If you notice a security issue, contact the BillKO team and indicate that your enquiry concerns security. Briefly describe what you noticed and when; our team will explain how to provide any additional information needed.
Frequently Asked Questions About Security
The certificate holder is KUPUJ ONLINE d.o.o., the company that provides BillKO. The ISO/IEC 27001 certificate was issued by SIQ.
The ISO/IEC 27001 certificate covers the information security management system of its holder, KUPUJ ONLINE d.o.o., within the scope stated on the certificate itself. The certificate was issued by SIQ. Contact the BillKO team for the exact scope and validity details.
BillKO operates in compliance with GDPR and maintains its compliance and documentation with expert support from Feralis. Access to data is organised by role and need. Details of personal data processing and how to exercise your rights are set out in the Privacy Policy.
You can find the Privacy Policy in the legal section of the BillKO website. Contact the BillKO team for current information about data processors and any documentation you need for an assessment or contract.
If you notice a security issue, contact the BillKO team and indicate that your enquiry concerns security. Briefly describe what you noticed and when; our team will explain how to provide any additional information needed.
Have a security or legal question?
Tell us what you need for an assessment, contract or internal review.
Have a security or legal question?
Tell us what you need for an assessment, contract or internal review.
Have a security or legal question?
Tell us what you need for an assessment, contract or internal review.