Update Error: Customer Mismatch

Written by the MyWorks Team

Updated at June 17th, 2023

Table of Contents

Keep getting this error when orders are syncing from WooCommerce to QuickBooks Online using MyWorks Sync?


An invoice or sales receipt already exists in QuickBooks Online with the same number as your Order# in WooCommerce - but it's under a different customer in QuickBooks Online than it is in WooCommerce - suggesting that the sales receipt / invoice in QuickBooks Online is a different sales receipt / invoice than the order in WooCommerce.


QuickBooks Online doesn't support multiple orders using the same number, so this error will purposely occur to both notify you that there's an overlap occurring in your order numbers between WooCommerce and QuickBooks, and protect you from having the different order in QuickBooks overwritten by our sync.

There's also a few different ways to resolve this!

- Firstly, we have a helpful doc with an overview of how order numbers being already used in QuickBooks can be resolved / worked around with using our sync:

What if my WooCommerce order numbers already exist in QuickBooks Online - as different orders?

- One of the most common/easy resolutions to this can be to set our sync to instead sync order numbers to QuickBooks as using the next available order number in QuickBooks, instead of the WooCommerce order number. We have a great doc on this here:

Using the next QuickBooks Online # when syncing orders