Accessibility links Skip to main content

BSN on invoices? Is that allowed under the GDPR?

The Citizen Service Number (BSN) is a personal identification number primarily intended for communication between citizens and the government. Non-governmental organizations may only use the BSN if required by law. Therefore, it must be verified whether there is a legal basis whenever the BSN is processed. In practice, our inspectors regularly observe that the BSNs of temporary employees are listed on invoices sent to the client. Is this permissible?

Continue reading

Why should you handle the BSN with care?

The BSN makes it easy to link information from different databases. Careless use of the BSN therefore poses privacy risks, such as the misuse of personal data and identity fraud. In cases of identity fraud, criminals misuse the data to, for example, purchase items in someone else’s name without paying.

Legal basis for processing the BSN

For chain liability and hirer liability, the hirer or (prime) contractor may (among other things) include the BSN in their records. This is necessary if the hirer or (prime) contractor wishes to make a indemnifying deposit into the temporary employment agency’s g-account. The “Implementation Regulation on the Mandatory Use of the BSN” stipulates that the staffing agency may provide the BSN of the assigned worker to the hirer or (prime) contractor. However, this must be done in accordance with the GDPR.

This means that the parties must mutually agree on when (at what point in time), how (via which document or connection), and in what manner (security, use, and storage) the BSN will be provided.

The question is whether an invoice provides sufficient security for disclosing the BSN. An invoice can typically be accessed by multiple people within an organization who have no authority whatsoever to process the BSN (for example, the mailroom, reception desk, etc.) as well as by third parties (such as our inspectors, the accountant, etc.). If an “unauthorized” person processes a BSN, this may be considered a data breach.

Amendment to the Payroll Tax Manual Effective January 1, 2020

Effective January 1, 2020, the Payroll Tax Manual has been amended, and BSNs may no longer appear on pay stubs.

Need help with certification in your industry?

Contact our specialist

Contact us

Vul het formulier in en wij nemen spoedig contact met je op.

Naam
In welk land wil je geholpen worden?
Privacyvoorwaarden 

Related news articles

Standard quality control certification assurance concept, checkbox icon of guarantee
21 May 2026

Copy of ID: When is it required? And when isn’t it?

During inspections, we regularly encounter clients who—intimidated by the GDPR—no longer know when a copy of an ID must be kept on file. We also see that copies have been made illegible and/or that the Citizen Service Number (BSN) has been removed.

21 May 2026

The SNA Quality Mark and the GDPR

We are often asked by customers whether it is necessary to enter into a data processing agreement with Normec VRO for inspections and audits. This is not the case.

A man is typing and looking at his laptop while holding a paper in his hand, working at his desk.
02 May 2024

Full verification of identity documents of great importance

The Netherlands Labor Inspectorate (NLA) found many errors during inspections in 2023 in the area of establishing the identity of workers using valid identity documents. In a large number of cases, the documents were expired, forged, not valid or the identity was not recorded at all. This is according to a report by the NLA.

Man and woman in a meeting, with the woman wearing a blue top taking notes while smiling during the conversation.
21 May 2026

Meeting administrative obligations

Employers have many administrative obligations. Failure to fully comply with these administrative obligations carries risks. For example, one of the consequences may be that you have to apply the anonymous rate. In this article, we explain when an employer must apply the anonymous rate and how to process it in the payroll tax return.

21 May 2026

Five questions for NEN 4400-1 inspectors

An inspection can be an exciting time for a company. Especially if it is a first inspection. By being clear and transparent, we as an inspection body can hopefully relieve some of that tension. Therefore, in this article you will read the answers to the five most frequently asked questions to our NEN 4400-1 inspectors.

business approve and certificate concept, document permit and certified
05 Oct 2023

A more risk-based approach

As of February 13, 2023, our inspectors have started testing against the revised SNA standard. The main purpose of this revision is to achieve a more risk-oriented approach. Companies that do not fall under the transitional arrangement and have to be tested against the new standard as of February 13 have been inspected by us in the past six months.

Sign up for the newsletter

Stay up to date on the latest news, exclusive updates, and valuable insights.

Sign up

Vul het formulier in en wij nemen spoedig contact met je op.

Naam
Privacyvoorwaarden 

Related services

Employees discuss information and collaborate on tasks in a modern office environment.

ISO 27001 certification

A business meeting between two professionals sitting at a desk with a laptop in an office setting.

ISO 27001 and NIS2

SNA seal of approval

An inspector is inspecting a home as part of an inspection, assessment, or certification process.

Fair Labor