Concurrent signalling

Stichting Inlichtingenbureau

Bureau InformatieDiensten Nederland (BIDN) receives lists of people on welfare benefits from municipalities and compares them with data from sources such as UWV, DUO and the Tax and Customs Administration. If there is any overlap (concurrence) that could affect the benefit, BIDN sends a message about this to the municipalities. The municipality can then carry out further checks.

Last change on 21st of July 2025, at 9:33 (CET) | Publication Standard 1.0

• Publication category: Impactful algorithms
• Impact assessment: DPIA
• Status: In use

General information

Theme

Social Security

Begin date

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Contact information

https://www.bidn.nl/over-ons

Link to publication website

https://www.bidn.nl/rechtmatigheid-samenloopsignalering

Responsible use

Goal and impact

A citizen applies for social assistance benefits. The municipality must determine whether the citizen is entitled to it. Bureau InformatieDiensten Nederland (BIDN) helps municipalities do this. During a benefit payment, the situation of the person entitled to the benefit may change. This may affect the benefit. For example, if someone has social assistance benefit and a job (income) at the same time. This can sometimes mean that the benefit has to be adjusted or stopped. In these cases, the municipality receives a notification from BIDN. This saves the municipality a lot of work, in determining whether someone is still entitled to benefits. This prevents people on benefits from having to deal with recoveries much later.

Considerations

Benefit recipients must report changes that affect their benefits to the municipality. But benefit recipients do not always manage to comply with this information obligation. With the help of BIDN's information, the municipality can better determine whether someone is still entitled to benefits. This makes work a lot easier for officials. It goes much faster than when someone does it by hand. There is also an advantage for benefit recipients. Subsequent payments or recoveries are prevented or reduced by this algorithm.

Human intervention

With BIDN itself, this algorithm does not involve human intervention. The algorithm executes rules devised by humans and is not 'self-learning'.

However, BIDN does ensure that the processing process has been done properly.

The municipality decides whether and how to deal with a change.

Risk management

Citizen privacy is a major concern. That is why we periodically check whether there are risks and what can be done about them. This is called privacy impact assessment (PIA).

Legal basis

The Participation Act stipulates that municipalities have a statutory duty to provide social assistance benefits. Part of this is to establish lawfulness both at the start and during the term of the benefit. To check this, the legislator has designated in Article 64 of the Participation Act a number of organisations (sources) that are obliged to provide data necessary for this check. BIDN assists municipalities in this process, combines and presents this data in the form of signals and reports that can be used by municipalities to implement legality checks.

The processing of personal data as part of this information service has the following basis(s):

Basis of processing sources (general)

• Sections 64(1) and 68 of the Participation Act
• Section 45(1), Income Support for Older and Partially Disabled Former Self-Employed Persons Act (IOAW)
• Section 45(1), Income Support for Older and Partially Disabled Unemployed Workers Act (IOAZ).

Basis processing BIDN:

• Sections 64(3) and 68 of the Participation Act
• Article 45(2), IOAW
• Article 45(2), IOAZ
• Section 63 Work and Income Implementation Organisation Structure Act (SUWI Act), Article 5.24, paragraphs 1 and 3, SUWI Decree & Articles 6.2 and 6.6 SUWI Regulation
• cooperation and exchange agreements

Basis of processing Municipalities:

• Chapter 5 'Implementation' and Chapter 6 'Powers and facilities municipalities' Participation Act
• Article 62 SUWI Act

See also the Data Register BIDN. Processing activities Act SUWI / Participation Act on the BIDN website to be found via the following page: https://www.bidn.nl/privacy-beleid

Links to legal bases

Participatiewet: https://wetten.overheid.nl

Link to Processing Index

https://www.bidn.nl/privacy-beleid

Impact assessment

Data Protection Impact Assessment (DPIA): https://www.bidn.nl/privacy-beleid

Operations

Data

Data supplied by the municipality:

- BSN

- BSN (Beneficiary partner)

- NAW - Date of birth (Beneficiary)

- Start date of benefit period

- End date of benefit period

- Legal basis of benefit (Code indicating the type of benefit: IOAW, WWB or AB, IOAZ). WWB and AB (General Assistance) refer to social assistance benefits as referred to in the Participation Act. The software supports the abovementioned codes for this purpose. The received data are stored in a customer tracking facility before further processing.

- Gender

- Form of life

- Name partner

- Date start

- end of relationship

Technical design

In connection with municipalities' statutory duties in the lawful provision of assistance, BIDN supports municipalities by performing file comparisons on data coming from different sources.

See the signal tests below on this site for more detailed information:

- Signal detention (including detention abroad) - Stichting Inlichtingenbureau (overheid.nl)

(see https://algoritmes.overheid.nl/nl/algoritme/signaal-detentie-inclusief-detentie-buitenland-stichting-inlichtingenbureau/32198791)

- Signal fugitive convicted persons

- Signal benefit from other municipality

- Student grant signal

- Signal cost-sharing

- Signal start income relationship

- Signal income Box 1

- Signal capital balance/interest

- Signal assets Box 3

- Signal vehicle ownership

- Signal college/university registration

- Signal bank account number

- Signal tax credits

- Signal support income offset assistance

The signal algorithms describe personal data exchanged with municipalities. The list below concerns general data provided with each signal.

- GSD

- code (municipal code according to the GBA)

- Signal number (unique identification number of the created signal)

- File code (of the file to which the signal belongs)

- Household type (indicator indicating how the household is typed, 1= single-person household, 2 = multi-person household)

- BSN

- Legal basis (Code indicating what type of benefit is involved: IOAW,WWB or AB,IOAZ)

- Start date-ukp (start date of benefit period)

- End date-ukp (end date of the benefit period)

- System end (Indicator showing whether the end date was set by the Intelligence Bureau or is the end date provided by the GSD)

- Initials, prefix, name (of the person to whom the signal belongs)

- Concurrence code (the code indicating the possible concurrence)

- Start date (Depending on the concurrence, the start of the employment, social insurance, benefits from another municipality, registration with the DUO, detention, alert in the investigation register, or the start of the tax year is indicated here)

- End date (Depending on the concurrence, the end of the employment, social insurance, benefit from another municipality, registration with the DUO, or the end of the tax year is indicated here)

- Creation date (The creation date and time of the signal determined by the concurrency application)

- Current (Indicator indicating whether a signal is current or invalid: 1 = current, 0 = invalid. A signal is invalid if there is no longer a concurrence afterwards due to a date correction in the benefit period or source data)

External provider

Internally developed.