What Is RTS in Shipping? Return to Sender Causes + Fixes
RTS means return to sender. It costs you money and annoys customers, and most of the time you can stop it. Here's what causes it and how to prevent it.

What does RTS mean? RTS means return to sender. Delivery failed, so the package is coming back to you. Bad address, refusal, and nobody home cause most of it. Check the address before you buy the label.
RTS means return to sender. The carrier couldn't deliver your package, so it's coming back to you.
We ship our own brands' orders and run a 3PL, so we see RTS from both sides. It costs you money, it annoys your customer, and most of the time you can stop it before it starts.
If you're still buying retail postage, run the 400-label audit before you buy another shipping tool.
Below: what RTS means, why it happens, what it costs, and how to prevent it.
What Does RTS Mean in Shipping?
RTS (return to sender) happens when a package can't be delivered, so it goes back to the person who shipped it. Carriers like UPS, USPS, FedEx and DHL mark a package RTS when delivery fails. Usually that's a wrong address, a customer who refuses it, or some other problem.
What to know about RTS:
- It can happen at any point while the package is moving.
- Carriers often charge extra to send it back.
- It slows down delivery and makes customers unhappy.
- Most RTS can be prevented with a few simple habits.
Common Causes of RTS Shipments
1. Wrong or Incomplete Address
A missing apartment number or a typo in the street name is one of the top reasons a package doesn't get delivered. It's also one of the easiest to fix. Check the address before you print the label, and you'll catch most of these.
2. The Customer Refuses It
A customer might change their mind, refuse to pay duties (import taxes) on an overseas order, or just say no at the door. Any of those sends the box back. Tell customers about duties and delivery timing before it ships, and this happens a lot less.
3. Nobody's Home
Carriers like UPS and FedEx usually try to deliver one to three times. If nobody's there and there's no safe spot to leave it, the package goes back. Sending tracking updates so customers know it's coming helps here.
4. Damaged Packages
A carrier may send a package back if it's badly damaged on the way. Good packing, especially for fragile items, cuts this risk.
5. Restricted or Banned Items
Shipping a restricted item without the right paperwork can get it sent back by customs or the carrier. Before you ship overseas, check what the carrier won't take and fill out the customs form.
The Hidden Costs of RTS
RTS eats into your profit in a few quiet ways:
- Extra shipping. You often pay the full return rate on top of what you paid to send it.
- Lost product. Some items can't be resold after the trip back.
- Support time. Your team handles the complaints and the reships.
- Your reputation. A failed delivery hurts most with first-time buyers.
When you ship a little, an RTS is a nuisance. When you ship a lot, it becomes a real cost.
How to Prevent RTS Shipments
1. Check Addresses Before You Print the Label
This is the biggest win. ShipGenius checks US addresses against USPS data on the ship screen before you buy the label, so you can fix problems first. Fixing a missing apartment number before it ships costs nothing. Getting the package back and shipping it again costs you twice.
2. Tell Customers When It's Coming
Send tracking and delivery updates as soon as the label is made. Customers who know when to expect a package are much less likely to miss it.
3. Explain Duties and Taxes Up Front
For overseas orders, make sure customers know about any customs fees before the package ships. Surprise charges at the door are a top reason people refuse international orders.
4. Pack It Well
A sturdy, well-sealed box is less likely to get damaged and sent back. That matters most for fragile items and long trips.
5. Make Returns Easy
This one sounds backwards, but it works. When customers trust they can return something easily, they're less likely to refuse the package at the door and trigger an RTS.
How ShipGenius Helps Reduce RTS
Most packages come back for two reasons: a bad address or nobody home. ShipGenius checks US addresses against USPS data before you buy the label, so you can fix them before the box leaves. When you create the label, you can subscribe your customer's email to tracking updates, and they hear from the carrier as the package moves. Together, that stops most RTS before it starts.
Core and Plus include US address checks before you buy the label, with no monthly fee. That's the RTS fix that costs nothing extra: catch the bad address on the ship screen.
FAQs
Who pays for RTS shipments?
The shipper usually pays both ways: the cost to send the package and the cost to get it back. That's why preventing RTS is much cheaper than dealing with it after.
What does RTS+7BD mean?
RTS+7BD is a tracking status you'll see when a package is headed back to the shipper. RTS still means return to sender. The +7BD piece is usually a carrier note about timing on that return, often read as about seven business days. Read the full scan on that carrier's tracking page for the exact reason, then fix the address or ask about intercept before the next shipment.
Can an RTS package be redirected?
Sometimes. Some carriers let you stop or redirect a package that's headed back. UPS, for example, offers a package intercept service for a fee. It's worth it when the item is worth more than the fee.
Does RTS affect delivery speed for other packages?
Not directly. Your other packages keep moving. But an RTS takes your team's time to sort out, reship and handle the customer, and that can slow everything else down.