Is Satan Real?
Do Jehovah's Witnesses Believe Satan is Real?
Yes. In the Jehovah Witness faith Satan is very real.
He is thought to be an angel who rebelled against God.
Now he walks the earth tempting humans to sin against God and do evil things.
Interestingly though, Jehovah's Witnesses do not believe that hell is a place of eternal torment. They say that when we die there is no consciousness.
Therefore if you happen to contact a spirit that represents themselves as a friend or relative that has passed away, it's a demonic entity trying to deceive you into believing that there is life after death.
More Information About Satan.