Hi @patrickhaond,
Thanks for reaching out.
Please deactivate and reactivate the plugin, then set the order number format to “[Prefix][Number]” with the prefix as “€” and choose your desired starting number from the sequential plugin settings page. Once done, please check again.
Please note that the “#” symbol displayed on the order list page is added by WooCommerce, and we don’t have control over removing it. Thanks for your understanding.
If the issue persists, kindly share a screenshot of the plugin settings page (WooCommerce > Settings > Sequential Order Numbers) and the order list page for a better understanding.
Kindly mask any user-sensitive information when sharing the screenshot requested above. You may share the details via?this link?if you have any privacy concerns.