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# How Residential Address Detection Works (and How You Benefit)

Residential pickups and deliveries cost more in LTL freight. Carriers charge an accessorial fee whenever a shipment moves to or from a home or a non-commercial address. If that fee isn't accounted for up front, the carrier can **re-bill you after delivery** — turning a clean quote into a surprise charge weeks later.
Shipduo helps you avoid that. Depending on how you're shipping, residential addresses are either **flagged automatically** or selected by you as an additional service. This article explains both, and why it saves you money.

## Automatic Detection: Quick Quotes & Checkout
When you use **Quick Quotes** or the **Checkout** feature, you don't have to do anything. Shipduo's algorithm automatically detects whether an address is residential and factors the residential surcharge into the rate before you ever see it.
That means:
* The rate you see already reflects the correct residential cost.
* Your customers at checkout get an **accurate price**, not an under-quote.
* There are no surprise carrier re-bills after the fact.
> 💡 **Tip:** Because detection is automatic here, the quoted price is the price you can rely on — no manual flagging needed.

## Manual Booking: Select It Yourself
When you book a shipment **manually**, residential detection isn't applied automatically — you select it from the **Additional Services** section.
1. While booking your shipment, scroll to **Additional Services**.
2. Under **Pickup**, check **Residential pickup** if you're collecting from a home or non-commercial address.
3. Under **Delivery**, check **Residential delivery** if you're delivering to a home or non-commercial address.
4. Add any other services you need (lift gate, inside delivery, appointment required, etc.).
5. Click **Save & Continue**.
> ![](https://storage.crisp.chat/users/helpdesk/website/-/f/8/1/5/f8152ba4a1e1a800/screenshot-0621-030407-pm_89z6sj.jpg)

> 💡 **Tip:** When in doubt, flag it. Selecting residential up front costs less than a carrier re-bill, and many lift-gate and limited-access situations go hand in hand with residential addresses.

## Why This Matters
* **Accurate rates:** the price reflects the real cost of the lane, so quotes hold up.
* **No re-bills:** carriers won't reclassify the shipment and charge you extra after delivery.
* **Better checkout experience:** customers are charged the correct shipping price the first time.
* **Smoother delivery:** flagging residential helps ensure the right service (and equipment) shows up.

## Troubleshooting
* **Rate went up after I flagged residential?** That's expected — the residential accessorial is now included, which means it won't come back as a re-bill later.
* **Got a residential surcharge on a manual shipment you didn't flag?** Carriers can detect and re-bill residential addresses themselves. Flag it at booking next time to lock in the rate.
* **Need help?** Chat with us or contact Shipduo Support.