This Customer Is One Special Character

I was reaching the end of a password troubleshooting phone call.

Me: “And your password must contain at least one special character, like an exclamation mark or dollar sign.”

Caller: “It does contain a special character!”

Me: “Which one?”

Caller: “The down-and-back arrow.”

Me: *Confused pause* “The what?”

Caller: “The down-and-back arrow! It’s on the right side, above Shift.”

Me: “That’s the Enter ke— Uh… Sorry, our system doesn’t recognize that as a special character. Can you pick a different one?”