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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.
 
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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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This method cancels an on-demand card read operation that is in-progress.

:::::notice{note}

 This method requires the following:

 - a valid connected ROAM card reader
 - an in-progress on-demand card read operation
 - an Android or iOS POS

 ROAM readers (including Moby) only support on-demand cancel read for Android and iOS.
:::::

## Code samples

### Java 

You need to set up an `ECLCardReaderCancelRetrieveCardDataListener` to handle callbacks during the on-demand cancel card read operation.

```java
private ECLCardReaderInterface _cardReaderInterface;

// finding available card reader and initilizaing _cardReaderInterface
...

public void _cancelCardDataRetrieval()
{
 _cardReaderInterface.cancelRetrieveCardData(new ECLCardReaderCancelRetrieveCardDataListener()
 {
 @Override
 public void cardReaderCancelRetrieveCardDataDidSucceed(ECLCardReaderInterface cardReader)
 {
 //handle successful cancel operation
 }

 @Override
 public void cardReaderCancelRetrieveCardDataDidFail(ECLCardReaderInterface cardReader, final ECCError eccError)
 {
 //handle failed cancel operation
 }
 });
}
```

### Objective-C 

You need to set up a delegate to implement `ECLCardReaderCancelRetrieveCardDataDelegate` and pass it to `cancelRetrieveCardData` function of card reader protocol. 

```objc
[cardReader cancelRetrieveCardData:delegate];

...

+ (void)cardReaderCancelRetrieveCardDataDidSucceed:(id<ECLCardReaderProtocol>)cardReader {
 //handle successful cancel operation
}

+ (void)cardReaderCancelRetrieveCardDataDidFail:(id<ECLCardReaderProtocol>)cardReader error:(NSError *)error {
 //handle failed cancel operation
}
```

Cancel card read

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