One invoice per shipment for Shopify orders that ship in parts.

Why one invoice per order doesn't work for split shipments

A wholesale or B2B buyer pays from a three-way match: purchase order, goods received, invoice. When an order for six items arrives as three items this week and three next week, a single invoice for all six matches neither delivery. Accounts payable holds it, someone emails you to ask which box it covers, and a net-30 invoice quietly becomes net-60.

Shopify has no concept of a per-shipment invoice. It issues one order confirmation and one receipt. Any invoicing app that works at the order level inherits the same limit. Qixeo Invoice works at the fulfillment level instead.

How Qixeo invoices each fulfillment

You don't create invoices by hand. Qixeo watches your orders and creates an invoice the moment a fulfillment is created in Shopify, covering only the items in that shipment. Fulfill the way you already do, from the Shopify admin, a 3PL, or a shipping app, and the invoice follows.

• Exactly one invoice per fulfillment. If Shopify notifies the app twice about the same fulfillment, the second notice is ignored, so there are never duplicates.
• Numbered by order and shipment. Your prefix, the Shopify order number, and a shipment suffix: INV-1042-A, INV-1042-B, INV-1042-C. Dot and dash number styles are available too.
• Other triggers when you need them. One invoice per order at checkout or at payment, or manual-only, for stores that mix B2B with digital goods or pre-payment.

How invoices are created, in the docs.

Totals that reconcile to the cent

Each invoice bills the items in its shipment plus their share of the order's tax and discounts. All amounts are calculated in whole cents.

• Line totals are the discounted unit price times the quantity shipped.
• Tax and discounts follow the items. If a line of ten units carries $8.00 of tax and you ship four, that invoice carries $3.20. This is always proportional.
• Shipping is your call. All on the first invoice (the default), split in proportion to each invoice's share of the subtotal, or allocated by hand.
• The final invoice closes the order. When a shipment covers the last items, its invoice is marked Final and calculated as the order total minus everything already invoiced. Any cent left over from rounding lands there, so an order's invoices always add up to exactly what Shopify charged.

Totals and reconciliation, with a worked example.

What the buyer sees

An invoice that matches the box. The PDF carries the PO number, payment terms and due date, a shipment label and a partial-invoice banner, the tracking number, and a "Still to come" list of what hasn't shipped yet. Optional reconciliation rows show the order total, what was previously invoiced, and the remaining balance, so AP can see the whole picture from any one document.

The invoice email links to a private status page for the order with one card per shipment: date, tracking, items, invoice number and total. Nobody has to ask where the rest of the order is.

When orders change

• Cancelled fulfillment. Its invoice is voided automatically and the timeline records why. An invoice that is already paid is left alone.
• Tracking updates. Changes to a fulfillment's tracking are copied to its invoice.
• Order edits. Invoices already issued don't change. If you edit an order mid-way, check the final invoice's total before sending it.
• Refunds. On Growth and above, a refund in Shopify creates a credit note linked to the original invoice, which is never altered.

Plans

Per-shipment invoicing, PO numbers, payment terms, payment recording and the status page are on every plan. Starter covers up to 50 invoices a month; Growth and above are unlimited. Every plan starts with a 30-day free trial, billed through Shopify. Compare plans.