ProperJob Uitzendbureau is a work agency that has a NEN-4400-1 certificate. This means we do our business strictly according to the rules as provided by the Dutch government. To get such a certificate the work agency gets 2 inspections every year. The certificate guarantees that we are a legit company that is not exploiting the customers and its workers. Everything is clear, no bending the rules and guaranteed payments by the book.
More info on the certificate can be found here: http://www.normeringarbeid.nl/
Check whether your current Uitzendbureau (in case you are already working in the Netherlands) has a certificate here: http://www.normeringarbeid.nl/ASP.NET/lijstGecertificeerden.aspx?typ=all