The integration identifies a NetSuite customer by email address (not case-sensitive) plus the country of the Shopify shop they ordered from.
- The same person ordering from shops in the same country, even across brands, is one NetSuite customer.
- The same person ordering from a shop in a different country is a separate NetSuite customer. That’s deliberate: each country can be its own subsidiary.
- Unchanged details aren’t sent again.
- An order needs a customer with an email. One without, such as a POS sale with no customer selected, isn’t synced and shows under Needs Attention on the Orders page.
To change a customer’s details in every system at once, use Customer Updates.
Full detail: NetSuite Shopify Integration.