> ## Documentation Index
> Fetch the complete documentation index at: https://docs.slm.m1amdocs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# AutoBill.finalizeCarrierBilling

The `finalizeCarrierBilling` method completes the process of signing up for a subscription using `CarrierBilling` as a payment method. This method enables merchants to pass a PIN, sent to customer’s phone, back to the Carrier for validation. Merchants must also pass a `transactionVid` to finalizeCarrierBilling. The `transactionVID` is the ID from the initial `Transaction` object returned by the `Autobill.update()` call. Use this method only when you are working with an `AutoBill` that is paid for with a Carrier-based payment method.

## 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.

*transactionVid*: Vindicia-generated ID (VID) for the Transaction. This will be available in the Transaction returned by the `AutoBill.update()` or `Transaction.authCapture()` call.

*confirmationCode*: Set this to the code the carrier sent to your customer’s phone, or to `true` if Boku redirected the customer to your Success web page (`returnUrl`). If Boku redirected the customer to your Failure page, set this to `false`.

## Output

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

*authStatus*: Status of the underlying validation transaction. This also contains responses received from PayPal.

*autobill*: Resultant AutoBill object. Subscribe populates this only if there is no error processing the call.

**Parent topic:**[AutoBill Methods](../topics/AutoBill_Methods)


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