# Cancelling Transactions

Sometimes a customer needs to cancel a purchase. When this happens, there are **two ways to handle it** depending on whether the transaction has been sent to the card company for settlement (a process called transmission):

1. If the transaction **hasn't been transmitted yet**, it is fully cancellable. The best part is that you won't be charged the credit card company's commission for it. You can cancel a transaction up until 22:00 Israel time on the same business day it was made.
2. If the transaction **has already been transmitted**, you can't cancel it anymore. In this case, you'll need to [refund your customer](/pay/common-use-cases/refunds.md) instead.

## How to cancel a transaction

To cancel a transaction before it's transmitted, just make a GET request to `https://pay.hyp.co.il/p/` with the `action` parameter set to `CancelTrans`:

{% code overflow="wrap" %}

```http
https://pay.hyp.co.il/p/?action=CancelTrans&Masof=0010131918&PassP=your-api-password&TransId=405532558
```

{% endcode %}

The request uses these parameters:

* `action`: Set this to `CancelTrans`.
* `Masof`: Your terminal number.
* `PassP`: Your API password.
* `TransId`: The unique ID of the transaction you want to cancel. You can find this in the [payment completion redirect](/pay/getting-started/creating-a-payment-page.md#handle-the-redirect-back-to-your-website) as the `Id` parameter.

Here's what a successful cancellation response looks like:

```
TransId=405532558&CCode=0&Hesh=EZ&ReversalStatus=777
```

If the cancellation works, the system returns `CCode=0` and `ReversalStatus=777`.

If the cancellation can't be cancelled — either because it was already transmitted or it doesn't exist — you'll receive `CCode=920` instead. You can find more information in our [Status Codes](/pay/reference/response-status-codes.md) reference.


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