---
title: cartBuyerIdentityUpdateDefault
description: Creates a function that accepts an object of CartBuyerIdentityInput and updates the buyer identity of a cart
api_version: 2026-10
source_url:
  html: https://shopify.dev/docs/api/hydrogen/latest/utilities/cart/cartbuyeridentityupdatedefault
  md: https://shopify.dev/docs/api/hydrogen/latest/utilities/cart/cartbuyeridentityupdatedefault.md
---

cart​Buyer​Identity​Update​Default

Not supported in this version.