Make sure to send an email to info@boomsma.nl and let us know which orders need to be merged (ordernumbers OW.... + OW...).
If you know beforehand you want to merge two orders you can leave a notification with your second order (please leave the other ordernumber with which it should be merged with).
When the package hasn't been prepared for shipment yet we will send it as one package. We only charge 1x shipping costs.