A trading relationship is a link between a seller and a payer that confirms both parties are trading with each other. You must set up a trading relationship before uploading and selling invoices between a payer and seller. By default, trading relationships inherits pricing set on the payer, however you can customise this pricing per payer-seller relationship.
You can open the Relationships tab once you've successfully completed setting up all required settings in the Limits and Pricing tab.
Select the Seller - The dropdown will only show sellers you have onboarded that do not have a trading relationship with the payer.
Customise Pricing - By default, trading relationships will inherit pricing set on the Payer, so only edit pricing if you intend to customise pricing for the given trading relationship.
Do not forget to enable the Is Active? checkbox.
The Submit button will appear disabled if you have not completed all required fields. After successfully saving changes and creating all trading relationships you can continue to the next step of the payer onboarding process - Activating the Payer Account