Is the work of a father in the Egyptian Customs Authority, specifically as a movement officer in the Port Said Free Zone, where he monitors and records exports and imports for factories and registers the sale of a percentage of their production to the local market, lawful or unlawful?

The permissibility of the father's work in the customs department depends on the legality of customs itself, whether his work is directly in collection or complementary to it. If customs are legitimate, then there is no objection to his work in monitoring and registering exports and imports. If they are not legitimate, then his work is not legitimate. It is best for him to ask trustworthy scholars in his country, and if they issue a ruling of permissibility, he may act upon their fatwa. If the matter is unclear to him, he should adhere to the saying of the Prophet, peace and blessings be upon him: "Indeed, what is lawful is clear, and what is unlawful is clear, and between them are matters that are doubtful, about which many people do not know. So whoever avoids the doubtful matters, he has sought to purify his religion and his honor. And whoever falls into doubtful matters, he falls into what is unlawful."