Making the spirits appear is an ancient claim
The claim of making spirits appear is not of recent invention, but it is an ancient claim indeed.
Ibn Taimiya wrote,
“ From those people [that is, those people of satanic influence involved in idolatry, polytheism, magic and so forth] are those who believe that if one of them dies, he returns to them after his death and talk to them, pays their debts, returns their pledges and advises them. He appears to them in the shape that he was during his life. It is a Satan who appears in his form and they think it is actually him.”
Ibn Taimiya, Jaami al-Rasaail, pp. 194- 195.