---
title: "Handle the Signature callback"
url: "https://docs.adyen.com/point-of-sale/classic-library-deprecation/classic-library-integrations/java-native-interface-integration/key-steps-jni/process-a-basic-transaction-jni/handle-the-signature-callback-jni"
source_url: "https://docs.adyen.com/point-of-sale/classic-library-deprecation/classic-library-integrations/java-native-interface-integration/key-steps-jni/process-a-basic-transaction-jni/handle-the-signature-callback-jni.md"
canonical: "https://docs.adyen.com/point-of-sale/classic-library-deprecation/classic-library-integrations/java-native-interface-integration/key-steps-jni/process-a-basic-transaction-jni/handle-the-signature-callback-jni"
last_modified: "2026-05-23T12:56:20+02:00"
language: "en"
---

# Handle the Signature callback

[View source](/point-of-sale/classic-library-deprecation/classic-library-integrations/java-native-interface-integration/key-steps-jni/process-a-basic-transaction-jni/handle-the-signature-callback-jni.md)

## Callback

| Name                           | Description                                                                                                                                                                                                                                                                                                                    |
| ------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `tenderCheckSignatureCallback` | When the system requires a signature, the PED shows the relevant data and the shopper can sign on the touch screen. The system invokes the `tenderCheckSignatureCallback` to allow the store assistant to accept or decline the signature.Trigger this callback by creating a tender with the `tenderOption` `receiptHandler.` |

## Callback Response Attributes

| Name              | Description                                                                                        |
| ----------------- | -------------------------------------------------------------------------------------------------- |
| `additionalData`  | Adyen returns the `additionalData` object, a generic container that can hold extra response fields |
| `tenderReference` | Reference the PED provides for the transaction, used in reporting on the Adyen payments platform.  |
| `tenderState`     | Transaction state                                                                                  |
| `adyenResult`     | Transaction result details                                                                         |

## Confirmation Method

| Name                    | Description                                                                                            |
| ----------------------- | ------------------------------------------------------------------------------------------------------ |
| `confirmCheckSignature` | This method runs against the tender object. Staff must verify the signature, and confirm or reject it. |

## Parameters

| Name              | Type                                        | Required                                                                                    | Description                                   |
| ----------------- | ------------------------------------------- | ------------------------------------------------------------------------------------------- | --------------------------------------------- |
| `tender`          | Tender                                      | ![-white\_check\_mark-](/user/data/smileys/emoji/white_check_mark.png "-white_check_mark-") | Use this as a key to confirm additional data. |
| `attendentAction` | com.adyen.jni.clib.AdyenPed.AttendantAction | ![-white\_check\_mark-](/user/data/smileys/emoji/white_check_mark.png "-white_check_mark-") | Indicates the action to be taken.             |

## Determine the current and final tender state

Adyen provides a method to determine the current, or final, tender state. For more information, see [Determine the current and final tender state - JNI](/point-of-sale/classic-library-deprecation/classic-library-integrations/java-native-interface-integration/key-steps-jni/process-a-basic-transaction-jni/determine-the-current-and-final-tender-state-jni).