# Acknowledgement Error Duplicate Request ID
source: https://developer.mastercard.com/account-catalog-services/documentation/testing/pan-registration-bau-depricated/pan-registration-modification/scenario2/index.md

## An Acknowledgement Error When a Duplicate Request ID Has Been Submitted {#an-acknowledgement-error-when-a-duplicate-request-id-has-been-submitted}

### Account Catalog Services API Request {#account-catalog-services-api-request}

* `requestId`: "request1"
* authorization: "reqKey"

* JSON

```JSON
{
  "accountIdentifier": "XXXXXXXXXXXXXXXX",
  "accountIndicator": "PRIMARY_ACCOUNT_NUMBER",
  "accountIdentifierExpirationDate": "0126",
  "accountLevelManagementServiceProperties": {
    "accountIdentifierStatus": "A",
    "rewardsProgramId": "MCC001"
  }
}
```

### Account Catalog Services API Response {#account-catalog-services-api-response}

* `requestId`: "request1"

* JSON

```JSON
{
  "Errors": {
    "Error": [
      {
        "source": "Account  Catalogue Service",
        "reasonCode": "R0000371",
        "description": "Request ID, provided in the Header, is a duplicate and used on a previous submission ",
        "recoverable": "false"
      }
    ]
  }
}
```