There could be a few reasons why an order can be marked as RTS or Return to Sender. If your order tracking has been updated to RTS the following are a few of the most common reasons. 

-Insufficient/invalid shipping address

-Business was closed/refused receipt 

-Unclaimed at customs 

-Refused/returned by the customer

Once the tracking is marked as RTS, Windsor cannot re-route the package. The order can be re-shipped or refunded. Please contact our customer service agents to advise them of how you would like be assisted.