Payment systems: DCS or OPP (formerly known as OBP)

Depending on the choices you make when creating a paid event, we will select a suitable payment system for you, which we will link to your event. With this payment system your participants are able to pay for their participation using the payment methods that you can set once the payment system is activated.

There are 2 options: Delft Congress Support or via Online Payment Platform.

Delft Congress Support (DCS)

DCS is a sister organization of If you choose DCS, you will therefore always find this name on the participant invoices. With DCS, we will take care of everything regarding payments, debtor management and invoices for you, so that you don't have to worry about it. has gained a lot of experience with payments over the years. Based on this experience, we have developed a professional way to process payments with DCS.

If a participant has purchased an admission ticket, they make their payment to DCS. We receive the participant fees and keep track on the outstanding participant invoices, which you can also find on your dashboard in

How does it work for your participants?

If your participant pays for an admission ticket via the registration form, he/she will receive an invoice from Delft Congress Support. When this invoice has been paid, we will complete the registration and the participant will receive a confirmation of payment and registration. DCS will of course then settle this admission ticket with you.

How does it work for you as an organizer?

All paid admission tickets that DCS has invoiced to the participants will also be settled with you. You will receive a invoice with all the collected participant fees after the event. This way your administration remains simple and clear.

Online Payment Platform (OPP)

Online Payment Platform is a Dutch payment service provider with a license from De Nederlandse Bank. Due to this collaboration with Online Payment Platform, it only takes 15 minutes for you as an user to create an account with OPP.

If you choose this option, you as the organizer will invoice the participant yourself and only the online payment will be processed by OPP. You do not have to create the invoice yourself, will do that for you. The invoice is in your name and it has your details. You can easily download these invoices to the participants and then process them in your own administration.
OPP deposits the money directly into your own account after a certain period. With iDEAL and Bancontact payments, this happens after 2 weeks. Credit card and PayPal payments will be made after the event.


You may be organizing an event abroad. With OPP you do not have to make use of the Dutch VAT scheme. You can use the VAT percentage of the country in which you are organizing the event.
Please note: this is not possible with DCS, DCS can only be used for events in the Netherlands.

Transaction costs

The transaction costs are the same for DCS and OPP.

Please note:
Do not forget to fill in your bank details in the settings of your event (billing profile), otherwise we will not be able to pay you the participant fees after the event.