# Code delivery

In the authentication process via WhatsApp, customers will receive a verification code through a WhatsApp message. They must enter the verification code into the system and press enter to confirm their identity.

To facilitate customers, you can use the verification delivery feature available in the Authentication template. This feature helps you enhance security and improve customer convenience during the verification process.

<figure><img src="https://765826444-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FLYDAnLjpg2T8z2BplJOS%2Fuploads%2FLBBONbgjZYh3AOufaWkM%2Fspaces_LYDAnLjpg2T8z2BplJOS_uploads_WxQ21b8A48YvRZUq8xa8_image.png?alt=media&#x26;token=818239b4-7a1e-4348-94e4-3042ce5f4923" alt=""><figcaption><p>Code Delivery</p></figcaption></figure>

### Autofill&#x20;

When you use **'Autofill'**, customers simply need to click the displayed button to automatically fill in the verification code, without having to copy and enter it manually.

<figure><img src="https://765826444-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FLYDAnLjpg2T8z2BplJOS%2Fuploads%2Fnl7GjYKMOigM7NfNDMpl%2Fimage.png?alt=media&#x26;token=9664158e-0201-4e3e-b748-89476279874b" alt=""><figcaption><p>Autofill Code Delivery</p></figcaption></figure>

**Component Explanation:**&#x20;

| Component                 | Explanation                                                                                                                                                                                                                                       |
| ------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Button text for autofill  | This section helps you define the text that will be displayed on the autofill button. You can enter up to 25 characters.                                                                                                                          |
| Button text for copy code | This section is for defining the text that will appear on the button to copy the code.                                                                                                                                                            |
| Package name              | This is the name of the Android app folder that will receive the verification code via autofill. This field is required if you want to use the **Autofill** feature, as WhatsApp needs to identify which app will automatically receive the code. |
| App signature hash        | This is a unique string used to identify the application authorized to receive the OTP code.                                                                                                                                                      |

### Copy Code

When you use **'Copy Code'**, the customer must manually copy the verification code from the WhatsApp message and they need to paste it into the application requesting the code.

<figure><img src="https://765826444-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FLYDAnLjpg2T8z2BplJOS%2Fuploads%2FQAvg6bdhNBKhuayRcU1U%2Fimage.png?alt=media&#x26;token=98b35671-18a4-449c-8b9d-e4e3568d4c45" alt=""><figcaption><p>Copy Code Delivery</p></figcaption></figure>

The **Button Text** option under **Copy Code** is used to define the text displayed on the button in the WhatsApp Authentication message. When users receive a message containing a verification code, this button allows them to copy the code automatically to the clipboard with a single click, making the code entry process into the application easier and faster.&#x20;