Sheikh Hamid Al-`Ali, instructor of Islamic Heritage at the Faculty of Education,Kuwait and Imam of Dahiat As-Sabahiyya Mosque, stated that:
“It is impossible to communicate with the dead. This is based on the verse in the Qur’an where Allah, Exalted be He, tells about the dead people: “And behind them is a barrier until the day when they are raised.” (Al-Mu’minoon: 100)
Meaning behind dead people is a world of Barzakh where they will stay until the Day of Judgment. No dead person can exceed the stage of Barzakh. Al-Barzakh means an interval or a barrier between two things; and technically, it stands for an intermediary stage between this life and another life in the Hereafter; it’s an interval between death and the Day of Resurrection.
A number of Hadiths state that if the dead person is righteous in his or her life, he/she will be in one of the gardens of Paradise, his/her soul will be in Jannah (Paradise) just like the souls of martyrs will be in Jannah; but this will be different from entering Paradise in the Hereafter. However, if the person does not comply with the rules of Allah in this life, he/she will be in one of the pits of Hell-Fire.
all scholars have unanimously agreed that no one can communicate with the souls of dead people whatsoever.
However, there can be communication with the soul of the deceased in dreams; and this can be interpreted by people who are expert in interpreting dreams. This is because the soul of the living person, when sleeping, departs this world and experiences a brief death, as Allah, the Almighty, says: “And He it is Who takes your souls at night (in sleep).” (Al-An`aam: 60)
this explains why the Prophet, peace and blessings be upon him, used to supplicate upon waking up from sleep, saying: “Thanks are due to Allah Who has raised us up after causing us to die, and to Him do we return.”
So, while sleeping, there might be a communication between two souls: a living soul (that has tasted a brief death) and the soul of a dead person.”