Digest/Shopify
HighBreaking change

Customer Account API removes lastIncompleteCheckout and Checkout types in 2026-10

The deprecated Customer.lastIncompleteCheckout field and the entire Checkout type subtree (AppliedGiftCard, CheckoutLineItem, ShippingRate) are removed from the Customer Account API in version 2026-10, with no replacement field in that API. Shopify directs developers to Storefront API cart flows and Customer.orders instead.

Action note

Before upgrading to Customer Account API 2026-10, remove all queries touching Customer.lastIncompleteCheckout or Checkout types and migrate to Storefront API cart flows or Customer.orders.

What to search in your codebase

  • Customer Account API removes lastIncompleteCheckout and Checkout types in 2026-10
  • Shopify breaking
  • API version 2026-10

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