---
title: "checkoutEmailUpdate"
description: "Updates the email on an existing checkout."
doc_type: graphql
doc_category: storefront
doc_version: v20270301
source_url:
  html: 'https://developer.shopline.com/docs/storefront-api/checkouts/mutations/checkout-email-update'
  md: 'https://developer.shopline.com/docs/storefront-api/checkouts/mutations/checkout-email-update.md'
---
# checkoutEmailUpdate

Updates the email on an existing checkout.

- **Required Scopes:** `unauthenticated_write_checkouts_info`
- **API Version:** v20270301
- **API Type:** Storefront
- **API Protocol:** GraphQL
- **Operation Type:** Mutation

## Type Signature

`CheckoutEmailUpdatePayload`

## Required Permissions

* `unauthenticated_write_checkouts_info`

An access token is required to call this API. Refer to [Authorization](https://developer.shopline.com/docs/apps/api-instructions-for-use/storefront-api/overview.md) for more information about how to obtain the token.

## Arguments

* `checkoutId`

  [String!](https://developer.shopline.com/docs/storefront-api/common/scalars/string.md)

  The ID of the checkout.

* `email`

  [String!](https://developer.shopline.com/docs/storefront-api/common/scalars/string.md)

  To update to the mailbox at checkout

## Returns

* `checkout`

  [Checkout](https://developer.shopline.com/docs/storefront-api/checkouts/objects/checkout.md)

  The updated checkout object.

* `checkoutUserErrors`

  [[CheckoutUserError!]!](https://developer.shopline.com/docs/storefront-api/checkouts/objects/checkout-user-error.md)

  The list of errors that occurred from executing the mutation.

## Code Example

```graphql
mutation checkoutEmailUpdate($checkoutId: String! $email: String! ) {
	checkoutEmailUpdate(checkoutId: $checkoutId, email: $email ) 
		 {
			# CheckoutEmailUpdatePayload fields
		}
		
	}

```

## Variables

```json
{
  "checkoutId": {},
  "email": {}
}
```

## Error Handling

For detailed information about common codes, see [Status and error codes](https://developer.shopline.com/docs/apps/api-instructions-for-use/storefront-api/overview.md#status-and-error-codes).