The Ghost and Mr. Chicken (1966)

Luther Heggs, a typesetter for the town newspaper, pitches an idea for a story about a local haunted house where a famous murder/suicide occurred 20 years earlier. After the editor assigns Luther to spend one night alone in the mansion, Heggs has a number of supernatural encounters and writes a front page story that makes him a hometown hero...until the nephew of the deceased sues him for libel.