What is the ruling on cheating in academic certification and working with it?

Question:
A man obtained an academic certificate, and he had cheated in the exams for this certificate. He also submitted a forged medical certificate to enter the exam in one of the years of this certificate. He is currently working in one of the positions with this certificate. What is the ruling on his salary, is it lawful or forbidden? Knowing that the work in this position was done after an oral exam which he passed, but one of the conditions of the position is submitting this academic certificate?

Answer:
This is reprehensible and wrong, and it is obligatory for him to repent to Allah, and that he not submit his certificate obtained through cheating or forgery. This is reprehensible. He must repent to Allah, Mighty and Majestic. As long as he was accepted in the position, performed its duties, and took care of it, there is no blame on him in that. He should not expose himself, but continue and perform the duty. If he fulfills the duty of the position, praise be to Allah. He must repent to Allah, feel remorse, and resolve not to return to it.