What is the ruling on writing an incorrect declaration in the master's registration stating non-concurrent enrollment in two programs, knowing that the person was already registered in another diploma? Is this considered falsification? And would the master's degree be religiously void or subject to suspicion, and does the rule "what is built upon falsehood is falsehood" apply to it? Does this also include the diploma? And is the salary obtained from working with this certificate forbidden or subject to suspicion? What should this person do to repent and purify himself from this declaration?

A Muslim must be truthful in all their affairs. Writing a declaration for the university that contradicts reality is a form of lying. One should fulfill the conditions they have committed to. If the conditions are violated and the university becomes aware of it, it has the right to cancel the registration or take appropriate action. However, if the university is unaware, he is not obligated to inform them. Instead, he should seek forgiveness and continue his studies. His degree is valid because the violation was in an external matter that does not affect the validity of the degree, which is based on study and research.