What does one do if he does not know whether the person in front of him is eligible for zakah or not?

Question:
I want to give someone from the zakah. Should I ask him if he is among those eligible for zakah or not?

Answer:
If you do not know him, but if you know him, give to him. That is, if you know his need and his poverty, give to him. If you do not know him and you are in doubt about his situation, say to him: This is zakah. If you are among those eligible for zakah, take it, and if you are among those eligible for zakah, leave it. The Prophet (peace and blessings be upon him) was approached by two men asking him for charity. He saw strength in them and said: If you wish, I will give to you, but it is not permissible for a rich person or for one who is strong and able to earn a living.