# customerMergePreview - admin-graphql - QUERY
Version: 2024-10

## Description
Returns a preview of a customer merge request.

### Access Scopes
`read_customer_merge` access scope.


## Arguments
* [customerOneId](/docs/api/admin-graphql/2024-10/scalars/ID): ID! - The ID of the first customer that will be merged.
* [customerTwoId](/docs/api/admin-graphql/2024-10/scalars/ID): ID! - The ID of the second customer that will be merged.
* [overrideFields](/docs/api/admin-graphql/2024-10/input-objects/CustomerMergeOverrideFields): CustomerMergeOverrideFields - The fields to override the default customer merge rules.


## Returns
* [alternateFields](/docs/api/admin-graphql/2024-10/objects/CustomerMergePreviewAlternateFields): CustomerMergePreviewAlternateFields The fields that can be used to override the default fields.
* [blockingFields](/docs/api/admin-graphql/2024-10/objects/CustomerMergePreviewBlockingFields): CustomerMergePreviewBlockingFields The fields that will block the merge if the two customers are merged.
* [customerMergeErrors](/docs/api/admin-graphql/2024-10/objects/CustomerMergeError): CustomerMergeError The errors blocking the customer merge.
* [defaultFields](/docs/api/admin-graphql/2024-10/objects/CustomerMergePreviewDefaultFields): CustomerMergePreviewDefaultFields The fields that will be kept if the two customers are merged.
* [resultingCustomerId](/docs/api/admin-graphql/2024-10/scalars/ID): ID The resulting customer ID if the two customers are merged.


## Examples