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# Authority to Leave

Authority to Leave (ATL) is a delivery preference that permits a carrier to leave a parcel unattended at the delivery address when no one is available to receive it. When ATL is granted, the driver will leave the parcel in a safe location — such as a front door, porch, or building foyer — without requiring a signature or in-person handover.

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## How It Works in Rendr

ATL is set at the delivery level using the `authority_to_leave` boolean field on the Create Delivery request. When set to `true`, the preference is passed to the carrier at the time of booking and displayed on the customer's tracking page.

```json
{
    "authority_to_leave": true
}
```

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## Important Considerations

* ATL is **not compatible** with deliveries flagged as `prescription_meds_s8` or other product types that mandate confirmed delivery and chain-of-custody.
* Depending on your account configuration, ATL may be automatically overridden for certain delivery scenarios — for example, a merchant may configure ATL to be disabled for high-value orders above a defined threshold, ensuring those deliveries always require a signature.
* If ATL is `false` (or omitted) and no one is home, the carrier will follow their standard failed delivery procedure, which may include a redelivery attempt or a card-to-collect notice.

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## Customer Experience

The ATL preference is surfaced to the customer on the Rendr tracking page so they understand how their delivery will be handled. If the delivery is left unattended, the driver will typically capture a photo as proof of delivery.