Please note: The algorithm descriptions in English have been automatically translated. Errors may have been introduced in this process. For the original descriptions, go to the Dutch version of the Algorithm Register.
Signal detention (including detention abroad)
- Publication category
- Impactful algorithms
- Impact assessment
- DPIA
- Status
- In use
General information
Theme
Begin date
Contact information
Link to publication website
Responsible use
Goal and impact
A person who is confined in a penitentiary is not entitled to welfare benefits. Municipalities have the duty to check this and, where appropriate, stop the social assistance benefit after investigation. The IB informs the municipality if a resident on social assistance benefits is confined in a penitentiary institution. This is done with information from the Judicial Institution Service (DJI) and the Ministry of Foreign Affairs (BuZa).
Considerations
The 'Signal detention' is part of the information service Samenloopsignalering (see algorithm 'Samenloopsignalering'). Only the specific points about 'Signal detention' are explained here.
The algorithm ensures that a municipality only receives the data of their residents with social assistance benefits who are in detention.
This protects the privacy of citizens. An advantage of this algorithm is that it works much faster than when someone does it by hand. This saves a lot of time for municipal employees. Also, fewer mistakes are made this way.
Human intervention
For the IB itself, this algorithm does not involve human intervention. The algorithm executes rules devised by humans and is not 'self-learning'.
However, the IB 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
Article 13(1)(a) of the Participation Act describes that there is no right to assistance for those who have been deprived of their liberty by law.
Basis processing Judicial Institutions Service (as a service under the Minister of V&J):
- Articles 64(1)(k) and (12) and 68 of the Participation Act
- Section 45(1)(k) and (11) Income Support for Older and Partially Disabled Former Self-Employed Persons Act (IOAW)
- Section 45(1)(k) and (11) of the Income Support for Older and Partially Disabled Unemployed Workers Act (IOAZ).
Basis processing Ministry of Foreign Affairs:
- Sections 64(13) and 68 of the Participation Act
Basis for processing IB:
- Article 64, third paragraph and thirteenth paragraph, and Article 68 Participation Act
- Article 45(2) and (11) IOAW
- Article 45(2) and (11) IOAZ
- Section 63 Work and Income Implementation Structure Act (SUWI), Section 5.24(1) and (3), SUWI Decree & Sections 6.2 and 6.6 SUWI Regulation
- IB-BuZa cooperation and exchange agreement
Basis for processing Municipalities:
- Section 13(1)(a) of the Participation Act.
- Chapter 5 'Implementation' and Chapter 6 'Powers and facilities of municipalities' Participation Act
See also the Data Register. Processing Activities Act SUWI / Participation Act on the IB website at the following page: https://www.bidn.nl/privacy-beleid
Links to legal bases
Link to Processing Index
Impact assessment
Operations
Data
On a daily basis, the Judicial Institutions Department (DJI) provides a file of persons newly committed to Dutch penitentiary institutions. The file contains BSN, start date (date of confinement) and a DT code of the penitentiary concerned.
For foreign detention, a source file is supplied monthly by the Ministry of Foreign Affairs. This file contains BSN and Detention Date (the date of commencement of detention at the penitentiary).
Municipalities supply the BSN of the current social assistance population on a monthly basis.
Technical design
A. The IB receives daily from the Judicial Institutions Department (DJI) a file of persons with the date of containment, supplemented by the DT code of the penitentiary concerned.
B. The IB receives a file once a month from the Ministry of Foreign Affairs (BuZa) with new detentions abroad.
C. A municipality provides a monthly file on the current social assistance population.
D. The information received by DJI and BuZa is used to compare whether the BSN appears in the IB's national social assistance population provision.
E. If a citizen has an assistance benefit and is detained, a signal is created and stored. Municipalities can then take these signals about their citizens from the IB.
External provider
Similar algorithm descriptions
- The purpose of this algorithm by the Intelligence Bureau Foundation (IB)* is to help municipalities understand which citizens may be entitled to special assistance, due to incomplete state pension benefits. The algorithm works like a postman, receiving, splitting and delivering a list of citizens from the SVB. So that each municipality receives a list of its own citizens.Last change on 4th of August 2025, at 13:09 (CET) | Publication Standard 1.0
- Publication category
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- Impact assessment
- DPIA
- Status
- In use
- Someone with social assistance benefit and (also) income from employment or another benefit will receive less benefit under the Participation Act. Excess benefit payments can also be reclaimed. To get a good overview of this income, municipalities can request information from Stichting Inlichtingenbureau (IB)*.Last change on 5th of August 2025, at 13:09 (CET) | Publication Standard 1.0
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- Impact assessment
- DPIA
- Status
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- Pursuant to the Participation Act, our municipality has to check the legitimacy of the benefit payments during their term. For this purpose, Midden-Groningen municipality uses the services of the national Intelligence Bureau in addition to the social investigation task force.Last change on 10th of January 2025, at 16:25 (CET) | Publication Standard 1.0
- Publication category
- Impactful algorithms
- Impact assessment
- DPIA
- Status
- In use
- An assistance recipient can only apply for assistance from the municipality where the resident is registered. For example, as a result of moving house, a person may receive assistance from several municipalities. Stichting Inlichtingenbureau (IB)* informs the municipalities about this. The municipalities can then stop unlawfully ongoing benefits.Last change on 5th of August 2025, at 11:23 (CET) | Publication Standard 1.0
- Publication category
- Impactful algorithms
- Impact assessment
- DPIA
- Status
- In use
- To determine whether you are entitled to benefits, the municipality uses decision rules. This supports the employee with advice on whether you are entitled to benefits. However, the final decision is made by an employee.Last change on 16th of June 2025, at 6:55 (CET) | Publication Standard 1.0
- Publication category
- Impactful algorithms
- Impact assessment
- DPIA
- Status
- In use