Articles on: Invoice Content

How to Add Order Identification Details to Invoices

The Order information section in the Visual Editor lets you control which order identification details appear on your invoice. You can toggle fields like the order number, invoice number, and PO number — each with a simple checkbox. This lets you tailor your invoices to show exactly the identifying information your customers and accounting team need.


Open the Order information section


  1. Open the Invoice Falcon app from your Shopify Admin.
  2. Click Templates in the left navigation menu.
  3. Click on the template you want to customize (or click Edit on the template row).
  4. Scroll to the Visual editor section and click the Open visual editor button.
  5. In the left panel, click the Order information section to expand it.


The section is divided into three sub-sections: Order identification, Order dates, and Order details. This article covers the Order identification sub-section.


Note: For Order dates (order date, issue date, due date, payment terms, date formats) and Order details (order amount, order tags), see their dedicated articles.



Order identification details


This sub-section controls which identifying numbers appear on your invoice. Check or uncheck each field as needed, then click Save changes.


  • Order number — displays the Shopify order name (e.g., #1001). This is the order number assigned by Shopify when the order was placed. Off by default.
  • Invoice number — displays the invoice number generated by Invoice Falcon (e.g., INV-1012). On by default.
  • PO number — displays the purchase order number if one was provided on the order. Useful for B2B transactions where customers reference a PO number. Off by default.
  • Custom invoice number — when enabled, uses a custom invoice number (if set) instead of the default Invoice Falcon invoice number. This is useful if you use a separate numbering system. Off by default.



Tip: For B2B invoices, enable both Invoice number and PO number so your customers can easily match invoices to their purchase orders.


Save your changes


After toggling any checkboxes:


  1. Review the live preview on the right to confirm the invoice looks correct.
  2. Click Save changes at the top of the Visual Editor.


Note: Changes apply only to invoices generated after saving. Previously generated PDFs are not affected.


Known limitations


  • Custom invoice number requires setup — the Custom invoice number checkbox only works if you have a custom invoice number configured for the order. If no custom number is set, the standard invoice number is displayed even when the checkbox is enabled.
  • PO number depends on Shopify data — the PO number only appears if one was entered on the Shopify order. If no PO number exists, nothing is shown even when the checkbox is enabled.
  • Settings are per-template — order identification settings are saved independently per template. Changing settings on one template does not affect others.


Troubleshooting


Symptom

Likely Cause

Fix

PO number checkbox is enabled but PO number does not appear

The Shopify order does not have a PO number

Add a PO number to the order in Shopify Admin, then regenerate the invoice

Invoice number shows the wrong number

Custom invoice number is enabled but no custom number is set

Uncheck Custom invoice number to use the default Invoice Falcon number, or set a custom number for the order

Order number not showing

The checkbox is not enabled

Expand the Order information section and check Order number, then save


FAQs


Q: Can I show both the order number and invoice number at the same time?
A: Yes. Check both Order number and Invoice number checkboxes. Both will appear on the invoice.


Q: What is the difference between invoice number and custom invoice number?
A: The invoice number is automatically generated by Invoice Falcon. The custom invoice number is a number you assign manually or through a custom numbering system. When Custom invoice number is enabled and a custom number exists, it replaces the default invoice number on the invoice.


Q: Will enabling a field that has no data cause a blank line on the invoice?
A: No. Fields are only rendered if the data exists. For example, enabling PO number on an order without a PO number will not show a blank "PO Number:" line.


Q: Which fields are enabled by default on a new template?
A: Only Invoice number is enabled by default. Order number, PO number, and Custom invoice number are all off by default.

Updated on: 20/05/2026

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