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Cancel an authorization

Learn what reversal are and how to implement them using Unzer API.


Canceling an authorization releases the reserved money for the customer’s payment method. This is also called reversal. You can only perform the cancel transaction on an existing authorization. This transaction is possible for selected payment methods only. Please check Payment methods page for details.

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Total amount
If you cancel an authorization, the total amount of the payment is reduced by the amount reversed.


Reversal is triggered by calling payments/{codeororderid}/authorize/cancels endpoint. You can cancel the authorization with an amount. In this case, only the specified authorization amount is released. If you do not specify an amount, the entire authorization is canceled.

  "amount" : "50.00"
Parameter Type Description
string Path Parameter — The related payment identity. This can be the paymentCode or ID.
amount float Amount in decimal values (for example, EUR 12.20)
    "id": "s-cnl-1",
    "isSuccess": true,
    "isPending": false,
    "isError": false,
    "message": {
        "code": "COR.000.100.112",
        "merchant": "Request successfully processed in 'Merchant in Connector Test Mode'",
        "customer": "Your payments have been successfully processed in sandbox mode."
    "amount": "50.0000",
    "currency": "EUR",
    "date": "2018-09-24 22:06:41",
    "resources": {
        "customerId": "s-cst-e769ddae5686",
        "paymentId": "s-pay-6986",
        "basketId": "",
        "metadataId": "",
        "traceId": "bf4ce634575d479eaaac4e6ad436d95d",
        "typeId": "s-crd-qfisvuhm3jog"
    "processing": {
        "uniqueId": "31HA07BC81AB33BC5F44A2659D5E80FC",
        "shortId": "4017.5320.1722"

As shown in the example, the cancel ID is returned with the value s-cnl-1. The parameters isSuccess, isPending, isError indicate the result of the transaction. Only one of these three can be true.

Status parameter Description
isSuccess The cancellation call was executed successfully.
isPending Never happens.
isError Something went wrong. message.merchant contains more information about the problem.

If there is an error, an error code is displayed in the details with a message for you and the customer.

Parameter Type Description
id string ID of this cancellation transaction
isSuccess boolean If the transaction was successful, the value is set to true.
isPending boolean Is not applicable for a cancel transaction.
isError boolean If an error occurs, this value is set to true.
message object
message.code string A 9 digit code returned with every API call.
message.customer string Response message for your customer translated into the customer language.
message.merchant string Response message for you. This message appears always in English.
amount string The amount to be reversed (released) on the specified account. The amount is in decimal form for example, EUR 1.22.
currency string(3) ISO currency code.
returnUrl string Always empty. Cancel transaction doesn’t require redirection or confirmation
paymentReference string The description of the transaction.
date date Timestamp of this transaction.
resources object
resources.customerId string Customer ID used for this transaction.
resource.basketId string Basket ID used for this transaction.
resource.metadataId string Metadata ID used for this transaction.
resources.paymentId string ID of the payment object.
resources.traceId string The unique traceId of the transaction. Used for internal API purposes.
resources.typeId string ID of the types resource which was used for this transaction.
processing object
processing.uniqueId string Reference id of the cancellation transaction.
processing.shortId string User-friendly reference ID of the cancellation transaction.
processing.iban string Your (merchant) IBAN in case of prepayment or invoice. In case of direct debit this value contains the customer IBAN.
processing.bic string Your (merchant) BIC for prepayment or invoice. In the case of a direct debit, this value contains the customer BIC.
processing.identification string This value returns the descriptor for invoice and prepayment.
processing.creatorId string This value returns your creditor ID.

For a full description of the cancel call, see the API reference guide.

See also