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U.S. Bank Europe DAC. Registered in Ireland – Number 418442..  Registered Office: Block F1, Cherrywood Business Park, Dublin 18, D18 W2X7, Ireland.
U.S. Bank Europe DAC, trading as Elavon Merchant Services, is regulated by the Central Bank of Ireland.
 
U.S. Bank Europe DAC. Registered in Ireland with Companies Registration Office. The liability of the member is limited. United Kingdom branch registered in England and Wales under the number BR022122.
U.S. Bank Europe DAC, trading as Elavon Merchant Services, is a credit institution authorised and regulated by the Central Bank of Ireland.  Authorised by the Prudential Regulation Authority.  Subject to regulation by the Financial Conduct Authority and limited regulation by the Prudential Regulation Authority.  Details about the extent of our regulation by the Prudential Regulation Authority are available from us on request.

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The merchant transaction reference provides the merchant with a way to associate a reference with a transaction and search for transactions associated with the reference.

## Code samples

### CWS 

#### Request

| Property | Description |
| --- | --- |
| parameters JSONObject required | All relevant parameters for merchant reference association. |
| merchantTransactionReference string optional | Merchant transaction reference Unique merchant reference code or ID with which to associate the transaction. |


#### Example

##### Request

Associate the transaction with the merchant reference code or ID.

```json
{
 "method" : "startPaymentTransaction",
 "requestId" : "45002870",
 "targetType" : "paymentGatewayConverge",
 "version" : "1.0",
 "parameters" : {
 "paymentGatewayId" : "79f139c4-3bb0-4bdb-b587-6cbcce02acf7",
 "transactionType" : "SALE",
 "tenderType" : "CARD",
 .....
 "merchantTransactionReference" : "Ras987",
 .....
 }
}
```

Search the transaction using the merchant transaction reference code or ID.

```json
{
 "method" : "searchPaymentTransaction",
 "requestId" : "45002903",
 "targetType" : "paymentGatewayConverge",
 "version" : "1.0",
 "parameters" : {
 "first6CC" : null,
 "creditCard" : null,
 "merchantTransactionReference" : "Ras987",
 "utcDate" : null,
 "paymentGatewayId" : "6a9d5538-2734-44b0-873f-5fa602860910",
 "transId" : null,
 "endDate" : "20161201",
 "last4CC" : "4243",
 "beginDate" : "20161201",
 "note" : ""
 }
}
```

### Java 

#### Sale with merchant transaction reference (Request)

```java
ECLCurrencyTransactionInterface transaction;
String mtr;
...
transaction.setMerchantTransactionReference(mtr);
...
account.getTransactionProcessor().processTransaction(transaction, tender, transactionListener);
```

#### Search transactions by merchant transaction reference (Request)

```java
ECLTransactionSearchCriteriaInterface theCriteria;
String mtr;
...
theCriteria.setMerchantTransactionReference(mtr);
...
account.getHistorian().search(theCriteria, this); 
```

### Objective-C 

#### Sale with merchant transaction reference (Request)

```objc
 id<ECLCurrencyTransactionProtocol> saleTransaction;
 ...
 [saleTransaction setMerchantTransactionReference:_merchantTransRefTextField.text];
 ...
 [[_account transactionProcessor] processTransaction:saleTransaction using:_tender delegate:self];
```

#### Search by merchant transaction reference (Request)

```objc
 id<ECLTransactionSearchCriteriaProtocol> searchCriteria;
 ...
 [searchCriteria setMerchantTransactionReference:_merchantTransRefTextField.text];
 ...
 [_historian search:searchCriteria delegate:self];
```

### C\# 

#### Sale with merchant transaction reference (Request)

```c#
 PaymentArgs paymentArgs;
 ...
 paymentArgs.merchantTransactionReference = tb_MTR.Text;
 ...
 m_CWS.StartPaymentTransaction(paymentArgs, MyNotifyCWSEvent, MyPaymentComplete);
```

#### Search transaction by merchant transaction reference (Request)

```c#
 TransactionSearchArgs tsa;

 ...
 tsa.merchantTransactionReference = tb_SearchMTR.Text;
 ...
 tsr = m_CWS.TransactionSearch(tsa, null); /* Search */
```

Merchant transaction reference

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