1. Cashflow360
  2. Xero
  3. Troubleshoot

Xero sync error: Invoice # must be unique

Why the sync error occurs

This error occurs when an invoice number already exists in Xero.

How to fix the sync error

Search for the invoice number:

  • If it is a duplicate, delete the invoice
  • If it isn't a duplicate, update the invoice number and sync again

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    What a customer sees when charged for a payment Vendor not connected yet Managing Vendor payment methods Payment timing - Payables Check payments Charging a customer Updating a vendor's bank information Setting up and using the Network Applying vendor credits Processing Items from the Inbox

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