---
title: "CustomerMergePreviewAlternateFields"
description: "Fields that will be overwritten after a customer merge"
doc_type: graphql
doc_category: adminGraphQL
doc_version: v20270301
source_url:
  html: 'https://developer.shopline.com/docs/admin-graph-ql-api/customers/objects/customer-merge-preview-alternate-fields'
  md: 'https://developer.shopline.com/docs/admin-graph-ql-api/customers/objects/customer-merge-preview-alternate-fields.md'
---
# CustomerMergePreviewAlternateFields

Fields that will be overwritten after a customer merge

- **API Version:** v20270301
- **API Type:** Admin
- **API Protocol:** GraphQL
- **Operation Type:** Object

## Type Signature

`CustomerMergePreviewAlternateFields`

## Fields

* `defaultAddress`

  [MailingAddress](https://developer.shopline.com/docs/admin-graph-ql-api/common-objects/objects/mailing-address.md)

  Customer's default address

* `email`

  [CustomerEmailAddress](https://developer.shopline.com/docs/admin-graph-ql-api/customers/objects/customer-email-address.md)

  Customer's email information

* `firstName`

  [String](https://developer.shopline.com/docs/admin-graph-ql-api/common/scalars/string.md)

  First  name

* `lastName`

  [String](https://developer.shopline.com/docs/admin-graph-ql-api/common/scalars/string.md)

  Last name

* `phoneNumber`

  [CustomerPhoneNumber](https://developer.shopline.com/docs/admin-graph-ql-api/customers/objects/customer-phone-number.md)

  Customer phone number information

## Schema Definition

```graphql
type CustomerMergePreviewAlternateFields { 
	defaultAddress: MailingAddress
	email: CustomerEmailAddress
	firstName: String
	lastName: String
	phoneNumber: CustomerPhoneNumber 
}
```

## Field from

* [CustomerMergePreview](https://developer.shopline.com/docs/admin-graph-ql-api/customers/objects/customer-merge-preview.md).alternateFields

  Default fields that will be overwritten after a customer merge

## Error Handling

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