---
title: CustomerMergeOverrideFields - GraphQL Admin
description: The input fields to override default customer merge rules.
api_version: 2025-10
api_name: admin
type: input-object
api_type: graphql
source_url:
  html: https://shopify.dev/docs/api/admin-graphql/latest/input-objects/customermergeoverridefields
  md: https://shopify.dev/docs/api/admin-graphql/latest/input-objects/customermergeoverridefields.md
---

# Customer​Merge​Override​Fields

input\_object

The input fields to override default customer merge rules.

## Fields

* customer​Id​Of​Default​Address​To​Keep

  [ID](https://shopify.dev/docs/api/admin-graphql/latest/scalars/ID)

  The ID of the customer whose default address will be kept.

* customer​Id​Of​Email​To​Keep

  [ID](https://shopify.dev/docs/api/admin-graphql/latest/scalars/ID)

  The ID of the customer whose email will be kept.

* customer​Id​Of​First​Name​To​Keep

  [ID](https://shopify.dev/docs/api/admin-graphql/latest/scalars/ID)

  The ID of the customer whose first name will be kept.

* customer​Id​Of​Last​Name​To​Keep

  [ID](https://shopify.dev/docs/api/admin-graphql/latest/scalars/ID)

  The ID of the customer whose last name will be kept.

* customer​Id​Of​Phone​Number​To​Keep

  [ID](https://shopify.dev/docs/api/admin-graphql/latest/scalars/ID)

  The ID of the customer whose phone number will be kept.

* note

  [String](https://shopify.dev/docs/api/admin-graphql/latest/scalars/String)

  The note to keep.

* tags

  [\[String!\]](https://shopify.dev/docs/api/admin-graphql/latest/scalars/String)

  The tags to keep.

***

## Map

No referencing types