What does the Church teach about ghosts?

What is the Catholic Church position regarding ghosts? Do clergy believe in ghosts?

The following links should help you better understand the Church’s position on supernatural phenomena. If you have any further questions, please contact Catholic Answers directly.
Recommended Reading:**

Do ghosts exist?

What is the difference between talking to a saint and talking to a ghost?

DISCLAIMER: The views and opinions expressed in these forums do not necessarily reflect those of Catholic Answers. For official apologetics resources please visit www.catholic.com.