Is it possible that some people can recognize the Night of Al-Qadr? Is it true that whoever sees its signs and supplicates that his supplication will definitely be answered?
All perfect praise be to Allah, the Lord of the worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His Slave and Messenger.
It is true that the supplication made at any of the recommended times is more likely to be fulfilled, Allah willing. The Night of Al-Qadr is one of these recommended times, along with the last third of the night and the time between the Athaan (call to prayer) and Iqaamah (the immediate call to prayer).
At such times, supplication is most likely to be answered provided there are no impediments present that would prevent the supplication from being answered.
Allah The Almighty may grant some of His slaves the privilege of seeing one of the signs of this great night. This happened with some of the Companions, may Allah be pleased with them. In a Hadeeth on the authority of ‘Abdullaah ibn ‘Umar, may Allah be pleased with him, it was mentioned that some of the Companions saw in their sleep that the Night of Al-Qadr is in the last seven nights of Ramadan. Hence, the Prophet ordered Muslims to seek this great night in the last seven nights of Ramadan. [Al-Bukhari]
Allah Knows best.