Adding Custom Fields to Invoice

Hi @vijustin

Yes, it is possible by overriding the template.

Here are the steps for the template override:

Open your active theme folder: wp-content/themes/your-theme/
Create a folder named woocommerce-delivery-notes inside it

1. Find the template file you want to change inside the plugin: wp-content/plugins/woocommerce-delivery-notes/templates/
2. Copy that file into the folder you created in step 2, keeping the same filename
3. Edit the copied file in your theme — the plugin will use it automatically

Available template files:

• invoice.php — Invoice
• receipt.php — Receipt
• deliverynote.php — Delivery Note
• packingslip.php — Packing Slip
• creditnote.php — Credit Note
• base.php — Shared layout used by all documents

Override styles
Find the CSS file you want to change inside the plugin: wp-content/plugins/woocommerce-delivery-notes/templates/css/

1. Copy it into your theme, recreating the same folder structure under woocommerce-delivery-notes/css/
2. Edit the copied file — your styles will be loaded instead of the plugin’s

Available CSS files:

• css/style.css — Applies to all documents
• css/html/style.css — Applies to browser print only
• css/pdf/style.css — Applies to PDF output only

Notes

• If using a child theme, create the folder in the child theme — not the parent
• The override affects only the live print preview and the document PDF generation. The frontend preview on the admin page isn’t affected.

Please check it on your end and let us know if there are any questions.