This POST method allows you to create a new business relation including contact and address details.
It is very important to understand how your request will be interpreted since this is a specific process and the outcome of your request can be unexpected.
First of all, the mandatory parameters are appended with an asterix (*). The rest of the parameters are not mandatory. The response of this request will be the details of the relation. The response format can be found in the ‘ListRelations’ endpoint response description.
Also, the parameters customerNumber and supplierNumber may not be 0. Sending 0 as number will be interpreted as an empty value.
Two parameters in this request needs some explanation: OnExistingRelationNumber and OnExistingRelationName. We will explain both parameters below.
Please note that is is not required to post a relation or suppliernumber. If you leave both numbers empty, we will automatically generate a number for you and return the newly created relation with the automatic defined number.