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 benefit other municipality

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. Bureau InformatieDiensten Nederland (BIDN) informs the municipalities about this. The municipalities can then stop unlawful ongoing benefits.

Last change on 17th 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

Field not filled in.

Contact information

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

Link to publication website

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

Responsible use

Goal and impact

On a monthly basis, municipalities provide data on welfare recipients to Bureau InformatieDiensten Nederland (BIDN). These data are compared with data from other municipalities. Overlap may occur: this means that a resident receives assistance not only from his (current) home municipality, but perhaps also from another municipality. BIDN informs both municipalities for which overlap has been identified about this. Municipalities can use this information to inquire with the benefit recipient or contact the municipality where the benefit recipient is also registered.

Considerations

The 'Signal benefit other municipality' is part of the information service Samenloopsignalering (see algorithm 'Samenloopsignalering'). Here, only the specific points are explained about 'Signal benefit other municipality'.


The algorithm ensures that municipalities only provide assistance to their own residents. An advantage of using this algorithm is that the resident gets what he is entitled to.


This protects the privacy of the citizen. 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

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

Basis of processing Municipalities:

- Article 40 Participation Act

- Sections 64(1)(a) and 68 of the Participation Act

- Chapter 5 'Implementation' and Chapter 6 'Powers and facilities of municipalities' Participation Act

- Section 45(1)(a) Income Support for Elderly and Partly Incapacitated Former Self-Employed Persons Act (IOAW)

- Section 45(1)(a) Income Support for Older and Partially Disabled Unemployed Workers Act (IOAZ).


Basis processing BIDN:

- Section 64(3) and Section 68 Participation Act

- Article 45(2), IOAW

- Article 45(2), IOAZ

- Section 63 Work and Income Implementation Organisation Act (SUWI), Section 5.24, paragraphs 1 and 3, SUWI Decree & Sections 6.2 and 6.6 SUWI Regulation


ZiZee also the Data Register BIDN. Processing Activities Act SUWI / Participation Act on the BIDN website on 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

See the algorithm "Concurrency signalling" for the data that are by default part of a signal.


Below are the data specific to this signal:

- BSN (Partner benefit recipient)

- Concurrence code (showing what kind of benefit it concerns)

- Start date of benefit period with another municipality

- Benefit period end date with another municipality

- Municipality code from which the GSD notification originates

- Municipality from which the GSD notification originates

Technical design

For each adult person from households entitled to social assistance, a comparison is made with benefit periods known from the social assistance population facility. This database contains all general social assistance, IOAW and IOAZ benefits provided by Dutch municipalities.


If the benefit recipient is known to receive a benefit from another municipality whereby the benefit period (partially) overlaps, this is known as concurrence and a concurrence signal is issued to both municipalities. A signal is made only from the moment the last benefit start date is more than 35 days ago. This "waiting period" of 35 days prevents unnecessary signals, as the leaving municipality still needs time to administratively terminate a benefit and make this known to BIDN via the monthly StUF delivery.


The data processing flows:


A. A municipality delivers a file relating to the current social assistance population to BIDN monthly via the secure client portal. After each delivery, a processing report is published, listing any errors in the delivery;


B. (temporary) storage of delivered BSN and corresponding signals in the social assistance population provision (customer tracking provision);


C. Every month, provided the municipality has set this up, a signal report is published on the portal with a total overview of the signals of the current population.

External provider

Internally developed

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