Customizing the invoice PDF on Shopify

Goal

Customize the appearance of the invoice PDF generated by POP: footer text, logo, and (optionally) the name of the downloaded file.

Prerequisites

• A paid plan: PDF customization is not available on the Free plan.
• Access to Settings > PDF customization in the POP for Shopify app.

Steps

1. Footer text — enter legal notes, bank details, or useful links to show at the bottom of the PDF.
2. Invoice logo — upload an image to show at the top of the PDF:
   • accepted formats: PNG, JPG, or SVG;
   • for PNG/JPG: maximum 600px per side and maximum 500KB;
   • after uploading, the logo URL appears in the “Logo URL” field (you can also remove it with Remove logo).
3. Use invoice number for PDF filename (optional toggle) — if enabled, the download/email file name uses VAT number + invoice number; the internal storage key stays unchanged.

Good to know

• Document title language — the “Invoice”/“Credit note” title on the PDF automatically follows the customer’s Shopify locale (German, English, Spanish, French, French-Belgium, Italian, or Dutch), not the merchant’s country. If the customer’s locale isn’t one of those, the title falls back to English. This isn’t configurable — it’s automatic on every document.

Verify

• Generate a test document and check that the footer and logo appear in the PDF.
• If you enabled the filename toggle, download the PDF and verify that the name contains the VAT number and invoice number.

Common errors

• “Upload a PNG, JPG or SVG image.” — the uploaded file is not in one of the accepted formats.
• “Logo must be smaller than 500KB.” — compress the image before re-uploading it.
• “Logo must be at most {max}px on each side.” — resize the PNG/JPG within the indicated limit before uploading.
• I don’t see these options — PDF customization requires a paid plan.

Related configuration

For automatic sending of the customized PDF, see shopify-auto-email-invoice. For the PDF document format, see api/pdf.