# Delete usage

Use the **deleteSubscriptionUsages** method via JSON-RPC API 6.0 to delete usage entered for a specific subscription, price options group, and usage interval.

## Request parameters

<table><thead><tr><th width="221.4666748046875">Parameter</th><th>Type / Description</th></tr></thead><tbody><tr><td><code>merchantCode</code></td><td><p><strong>Required (string)</strong></p><p>The system-generated merchant ID.</p></td></tr><tr><td><code>sessionID</code></td><td><strong>Required (string)</strong><br>The system-generated code of the session.</td></tr><tr><td><code>hash</code></td><td><strong>Required (string)</strong><br>The MD5 hmac key for the request.</td></tr><tr><td><code>SubscriptionReference</code></td><td><strong>Required (string)</strong><br>Unique code that represents a subscription. Example: 83FE4FEF2.</td></tr><tr><td><code>UsageReference</code></td><td><strong>Optional (number)</strong><br>The system-generated reference code for the usage of the subscription.</td></tr><tr><td><code>OptionCode</code></td><td><p><strong>Optional (string)</strong></p><p>Unique 2Checkout option code. The pay-per-usage price options group for which the usage is uploaded. Example: metered pricing.</p></td></tr><tr><td><code>IntervalStart</code></td><td><p><strong>Optional (datetime)</strong></p><p><strong>(mandatory if IntervalEnd is provided)</strong></p><p>Deletes all usages where <code>UsageEnd</code> >= <code>IntervalStart</code>. Format "YYYY-MM-DD". The timezone used is the one on the server.</p></td></tr><tr><td><code>IntervalEnd</code></td><td><p><strong>Optional (datetime)</strong></p><p><strong>(mandatory if IntervalStart is provided)</strong></p><p>Deletes all usages where <code>UsageEnd</code> &#x3C;= <code>IntervalEnd</code>. Format "YYYY-MM-DD". The timezone used is the one on the server.</p></td></tr></tbody></table>

### Request Sample

```php
<?php
require ('PATH_TO_AUTH'); // authentication call
$SubscriptionReference = 'B7D8E72224';
$UsageReference = 120010776516;
$jsonRpcRequest = array('jsonrpc' => '2.0', 'method' => 'deleteSubscriptionUsages', 'params' => array($sessionID, 'SubscriptionReference' => $SubscriptionReference, array("UsageReference" => $UsageReference, "OptionCode" => 'USG_MN', "IntervalStart" => "2018-04-14 13:00:10", "IntervalEnd" => "2020-09-16 13:00:10")), 'id' => $i++);
var_dump ("deleteSubscriptionUsages", callRPC((Object)$jsonRpcRequest, $host));
```

## Response

The **deleteSubscriptionUsages** method via JSON-RPC APIv6 returns NULL when successful.

```php
class stdClass#3 (3) {
  public $code =>
  int(0)
  public $message =>
  string(46) ""
  public $data =>
  NULL
}
```

## Error handling

The **deleteSubscriptionUsages** via JSON-RPC APIv6 returns FALSE if:

| Error message code                                            | Error code            | Error message description                                                                                               |
| ------------------------------------------------------------- | --------------------- | ----------------------------------------------------------------------------------------------------------------------- |
| **Provided parameters lack the required type or format.**     | MALFORMED\_PARAMETER  | One or more parameters lack the required format: `SubscriptionReference` must be a string.                              |
|                                                               | MALFORMED\_PARAMETER  | One or more parameters lack the required format: `UsageReference` must be a positive integer higher than or equal to 1. |
|                                                               | MALFORMED\_PARAMETER  | One or more parameters lack the required format: `Units` must be a positive integer higher than or equal to 1.          |
|                                                               | MALFORMED\_PARAMETER  | One or more parameters lack the required format: `IntervalStart` must be a string.                                      |
|                                                               | MALFORMED\_PARAMETER  | One or more parameters lack the required format: `IntervalEnd` must be a string.                                        |
| **The subscription or usage line are not found.**             | NOT\_FOUND            | Subscription not found.                                                                                                 |
|                                                               | NOT\_FOUND            | Usage line described does not exist.                                                                                    |
| **The usage line is already billed.**                         | ALREADY\_BILLED       | Usage was not deleted as this usage was already billed.                                                                 |
| **The renewal process is in progress for this subscription.** | RENEWAL\_IN\_PROGRESS | There is a renewal in progress for the provided usage line.                                                             |
| **An unexpected error happens.**                              | GENERIC               | There has been an error deleting the usage line. Please try again later.                                                |


---

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```
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```

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