Before your affiliate program can start you should implement the Daisycon conversion pixel. This pixel measures if a transaction has been generated.
For popular content management systems, Daisycon has developed standard solutions. You can read more about these solutions here (in Dutch).
The conversion pixel should be placed on the 'thank you page' of your website. The thank you page is the page that is shown after a transaction has been done, to confirm the transaction.
The pixel you find when you log in (as an advertiser) to the Daisycon system. Go to 'Tools' / 'Conversion codes' / 'Daisycon code'.
As a software developer to implement the code on your thank you page, or use one of Daisycon's standard solutions. For most developers, implementing a conversion pixel is pretty straight forward.