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# Chargeback.fetchByCaseNumber

Case and reference numbers are usually assigned by payment processors to track chargebacks in their systems. Some processors assign case numbers; others, reference numbers; and some assign both. In some cases, multiple chargebacks have the same case or reference number.

The `fetchByCaseNumber` method returns one or more `Chargeback` objects whose case number matches the input. The `fetchByReferenceNumber` method returns one or more `Chargeback` objects whose reference number matches the input.

## Input

*srd*: sparse response description, a SOAP string (which must be a JSON object), in which you specify the elements you want returned.This parameter enables the calling system to constrain a `method` call to return only components you specify. This gives you greater control over returned content, and improves response time within the Vindicia platform by reducing the processing needed for the call.

Some fields are required, either practically or in the WSDL, and will be returned regardless of the *srd*. A null *srd* returns the complete response.

For `fetchByCaseNumber()`, *caseNumber* is the payment processor’s case number, which serves as the search criterion.

For `fetchByReferenceNumber()`, *referenceNumber* is the payment processor’s reference number, which serves as the search criterion.

## Output

*return*: an object of type `Return` that indicates the success or failure of the call.

*chargebacks*: an array of one or more `Chargeback` objects whose case or reference number matches the input.

## Returns

In addition to those listed in [The Return Object](The_Return_Object), `fetchByCaseNumber` also returns:

| Return Code | Return String |
| - | - |
| `400` | One of the following: - `Unable to load chargebacks by case number *input-case-number:* No match.` - `Unable to load chargebacks by case number *input-case-number: error-description*.` - `Must specify a case number to load by!` |
| In addition to those listed in [The Return Object](The_Return_Object), `fetchByReferenceNumber` also returns: | |

| Return Code | Return String |
| - | - |
| 400 | One of the following: - `Unable to load chargebacks by reference number *input-reference-number:* No match.` - `Unable to load chargebacks by reference number *input-reference-number: error-description*.` - `Must specify a reference number to load by!` |

## Example

```

// The following example uses the fetchByCaseNumber call
// Call fetchByReferenceNumber similarly

$cb = new Chargeback();
$caseNo = "34593201";
$ret = $cb->fetchByCaseNumber($caseNo);
if ($ret['returnCode'] == 200) {
$fetchedChargebacks = $ret['chargebacks'];
   if ($fetchedChargebacks != null) {
      foreach ($fetchedChargebacks as $chargeback) {
         // process a fetched chargeback here …
         $status = $chargeback->getStatus();
         $amount = $chargeback->getAmount();
      }
   }
}
```

**Parent topic:**[Chargeback Methods](../topics/Chargeback_Methods)


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