State Secretary John Crombez presents the electronic application Dolsis of the National Social Security Office (NSSO) 2012-11-30

This morning John Crombez, State Secretary for the fight against tax and social fraud, has presented the application Dolsis. Dolsis, a joint initiative of the NSSO (National Security Office) and the CBSS (Crossroads Bank for Social Security) is a new electronic application which gives public institutions of all levels a secure and direct access to the data of the NSSO. According to John Crombez, this application constitutes a concrete example of the crossing of data bases. It provides for a better fraud prevention and detection, a heightened efficiency of the departments concerned and an administrative simplification.

Dolsis has been nominated for an eGov Award in the category ‘Cost-effective projects’.

How does Dolsis function?

Dolsis  operates through a ‘self service’ principle : public institutions who need the data managed by the NSSO get the possibility to consult these in real time, without having to apply first to another public department. This marks a great step forwards. In the past the data were communicated to institutions as raw data, which obliged them to develop themselves a user interface. This constituted a time-consuming, expense and complex procedure, which deterred many public services.

A public institution can opt to integrate the data flow in its proper ICT environment or can use the standard web application.

You can download on the following URL a video illustrating the functioning of Dolsis :

Which data?

Dolsis offers public institutions  the following data :

  • the workers’ personal data (originating  from the National Register and the data bases of the CBSS);
  • a profile of the employers;
  • the labour relations (Dimona);
  • the workers’ wages and working time (DmfA);
  • data relating to the foreign labour in Belgium (Limosa registry).

Less red tape

The direct opening up of information originating  from authentic data sources offers a forceful instrument for administrative simplification at governmental level and in its interaction with citizens and enterprises.

The NSSO on its own hands annually more than 100,000 paper certificates concerning the employment, in part directly to other public services and in part to citizens and employers (many times indirectly at the request of other public services). These requests create sometimes among citizens and enterprises a sense of frustration and incomprehension. The application Dolsis intends to bring about a significant decrease in the number of requests for paper certificates.

A tool in the fight against fraud

Dolsis may contribute to ameliorating the tracing of all sorts of fraud. Until now the data of the NSSO constituted for some institutions the missing piece of the puzzle in compiling fraud files. By combining the proper data and the information provided for by the NSSO, other institutions are being offered a new solid tool helping them in their fight against fraud.

Dolsis increases the mutual transparency between the different public institutions. The basic social security data are rendered in the same way for all users of Dolsis, decreasing thus the chance of interpretation errors to a minimal level. The federal and regional inspection departments will be able to consult exactly the same information in the same form.

Through a rapid detection of abuses or inconsistent declarations , the public institutions can therefore concentrate more on their core tasks such as the provision of services to citizens and enterprises and the prevention of fraud rather than the sanctioning of fraud.

You will find some striking examples of the role of Dolsis in the field of the fight against fraud under the item ‘Dolsis in action’.

Cooperation between policy levels

Dolsis expressly aims at promoting the mutual cooperation of public services. This cooperation is not limited to the federal level : as it is regional authorities (regions, communities) and local authorities (municipalities,  public welfare centres, local police departments, ...) may also obtain access to Dolsis.

An example of a federal-regional cooperation is given under the item ‘Dolsis in action’.

Dolsis in action

The following examples show how Dolsis boosts the fight against fraud and the cooperation between the public institutions :

  • Persons applying for a residence permit in Belgium have to submit to his end a work certificate serving as a proof that they are at the service of a Belgian employer. The Immigration Office (FPS Home Affairs)  uses the application Dolsis to check whether the work certificate submitted is linked to a durable job or whether we are dealing here with fraud.
  • Foreign workers wishing to work in Belgium have to apply at the Regions for a work permit. By using Dolsis the regional employment services can examine whether the worker is being employed on a durable basis. Even in case of a prolongation of the permit after one year, the Regions have now the possibility to verify if the worker still meets the conditions.
  • The FPS Mobility will be able to use Dolsis in order to ascertain with which employer truck drivers working in Belgium are registered.
  • Public organizations granting subsidies can now check on the basis of the Dolsis data whether the request for a subsidy is justified and what should be the amount to be paid out.


The access to Dolsis is linked to strict safety requirements, which guarantee the citizens’ and entreprises’ privacy. Thanks to the electronic identity card (eID) the user can log in smoothly at a high level of security (2-factor authentication). The existing social security framework for user management (user & access management) checks at every session the professional user’s authorization and filters the data shown according to his or her role. Moreover a trace of each request is kept automatically (logging).

Standardization and reuse

Dolsis constitutes an excellent example of how ICT realizations are further developed. The application only operates thanks to a far-reaching standardization of the existing social security applications depending upon the  CBSS as a secured exchange platform. This unique approach which is in Belgium since at least 20 years a perfect example of  good e-Government practices guarantees for instance the reusability of the keystones of the access right management and the logging.

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