---
title: CustomerIdentifierInput - GraphQL Admin
description: The input fields for identifying a customer.
api_version: 2026-10
source_url:
  html: >-
    https://shopify.dev/docs/api/admin-graphql/latest/input-objects/CustomerIdentifierInput
  md: >-
    https://shopify.dev/docs/api/admin-graphql/latest/input-objects/CustomerIdentifierInput.md
api_name: admin
api_type: graphql
type: input-object
---

# Customer​Identifier​Input

input\_object

The input fields for identifying a customer.

## Fields

* custom​Id

  [Unique​Metafield​Value​Input](https://shopify.dev/docs/api/admin-graphql/latest/input-objects/UniqueMetafieldValueInput)

  The [custom ID](https://shopify.dev/docs/apps/build/custom-data/metafields/working-with-custom-ids) of the customer.

* email​Address

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

  The email address of the customer.

* id

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

  The ID of the customer.

* phone​Number

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

  The phone number of the customer.

***

## Map

No referencing types