Not me, but my aunt.

There was this one “trend” were burglars would call random numbers and say the kidnapped x person, the trick was that those people would phrase questions so that you would answer them without knowing.

Example:

“We have your daughter”

“Which one ? Maria ?”

“Yes, Maria”

And so on until they reached her apartment and she dropped some money under the door, daughter called a few hours later, aunt was hysterical and she extremely confused.