SHARECOMMENTMORE

(WXIA) -- A working college student was shocked when the U.S. Postal Service returned the $400 she'd accidentally placed in the mail, and they did it in only a few days.

"I just kissed it goodbye," said Betsy Holmes. "I kind of kicked myself for it. I was in a rush."

The $400 was for a new laptop computer. Holmes placed the cash in an envelope she got from work and wrote "deposit" on the outside.

On the way to the bank, she stopped by a post office drop box.

That's where everything went wrong.