Important! Read this article if you are planning to integrate multiple Neto accounts with a single Xero account. If you are unsure what to do, call or email Neto support.
So transactions are not rejected for being duplicates when importing to Xero from multiple Neto accounts, you need to add a few simple configurations to your Xero accounting integration settings in Neto.
This involves adding prefixes to invoice, credit note and payment numbers exported to Xero by each Neto site. This ensures each sites transactions are always unique.