AskSatanOperator said:
How can I make a distinction if my summoned daemon is the real deity and there's no connection of grey/ or parasite beings?
If you summoned the Demon using the method on JoS in which you ask Satan to send you that Demon you will only get the real being, not an enemy grey so you have nothing to fear.
That's why it's not recommended to summon them using ouija boards or in any other way other than by asking Satan to send him/her to you, because you can easily get an enemy being instead. Even worse is if you try to summon them using the old grimoire methods, you will almost certainly either summon an enemy being or have negative experiences.
But there are some methods of testing a being, such as using an electric blue fire on them (the enemy greys fear this type of energy) or make them swear to Satan.