> ## Documentation Index
> Fetch the complete documentation index at: https://signatureapi-daf4ee54.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Sender Lifecycle

> The verification lifecycle of a sender.

When you create a sender, it starts in `pending_verification` status. SignatureAPI sends a verification email to the address. Once the address owner clicks the confirmation link, the status changes to `verified`. If the verification email bounces or an error occurs, the status changes to `failed`.

Only senders with `verified` status can be assigned to envelopes.

| Status                 | Description                                                                               |
| ---------------------- | ----------------------------------------------------------------------------------------- |
| `pending_verification` | A verification email was sent. The address owner has not yet confirmed.                   |
| `verified`             | The address owner confirmed the verification email. This sender can be used on envelopes. |
| `failed`               | Verification failed due to a bounce or error. This sender cannot be used.                 |

Subscribe to [`sender.verified`](/docs/api/resources/events/sender-events#sender-verified) or [`sender.failed`](/docs/api/resources/events/sender-events#sender-failed) webhook events to track the outcome.