NRDS requires that a NRDS ID be sent with every Ecommerce transaction it receives, without exception. To satisfy this requirement, GrowthZone is configured with a default NRDS ID (it is suggested that a staff member ID is used) in case a customer attempts to process a transaction and does not posses their own ID. This setting must be configured by your GrowthZone onboarding manager.
GrowthZone will attempt to send the payer's NRDS ID whenever possible, but if unable, will apply the association's default NRDS ID. The logic is as follows (click to enlarge):