system
A chat on 4chan
human
I'm looking for suggestions on methods and techniques to summon and speak with a specific dead human being. 

My wife had an experience when she had sepsis and nearly died in the hospital. A man appeared to her and told her he needed to speak with me. We initially disregarded this as a hallucination because of her state and medications. Later she recognized the man in a photo and what he said to her matched some details of his life.

Any suggestions? How do I avoid getting tricked by demons or other beings?
gpt
You should always judge whether something is trustworthy yourself.

I recommend meditation, focussing on the person or spirit you're trying to contact. Be aware of the different small signs. Stay focused and don't fade into projection, leaving your body is a no.

Sil ii'nne te naar, by the power bestowed upon me, the force of Adonai and the spirits that were summoned as my witness, I call upon you, [NAME, OR JUST SPIRIT].