The Labor Inspectorate has raided three PostNL branches in Belgium.
Various violations such as undeclared work were identified.
One of the three depots will remain temporarily closed.
It is already the third time in a short time that the company has been raided in Belgium.
The raids took place on Monday morning at parcel depots in Mechelen, Wommelgem and Ardooie, the company informs NU.nl.
According to the inspectorate, there are violations in both Mechelen and Wommelgem.
In addition to undeclared work, this would include illegal employment.
The depot in Wommelgem has been temporarily closed by the inspection service.
As a result, PostNL can no longer access about 5 percent of the packages that the company would process on Monday.
It is not yet known how long the depot will remain closed.
As a result, it is also not clear how much delay the delivery of those packages will be.
A spokesperson said the company wants to resolve the issues as soon as possible.
PostNL does not deliver all packages itself.
The group often hires other companies for this, so-called subcontractors.
It is not yet clear which part of the violations occurred at those subcontractors.
PostNL says it is fully cooperating with the investigation.
It is not the first time that the Dutch company has received a visit from the Belgian inspection service.
There was also a raid in June.
It turned out that about half of the subcontractors did not comply with the rules.
The Labor Inspectorate then said it might close depots if a subsequent check showed that rules were still being broken.
So that has now happened.Keywords: