Save the U.S. POSTAL Service VOTE BLUE
In my experience the post office holds mail until it can be redelivered. I am sure there are instances where mail is returned to the sender; for example, an address is not deliverable due to unsafe conditions or the delivery location being destroyed. Contrary to this, a company like UPS might immediately return a package to the sender; for example an Amazon delivery would be returned and your order refunded.
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