What is the ruling on working at the Egyptian Post Authority as a training coordinator, given the presence of usurious activities within it, and in the case of certainty or doubt that the training programs or trainees are connected to usury?

If the permissible activities of the postal authority outweigh its usurious activities, then it is permissible to work or train there, provided that the work is not directly in the usurious section, or that the training is specifically related to the usurious activity. Sheikh Al-Uthaymeen said: "If the predominant part of a company's work is unlawful, then it is not permissible to engage in it; but if the predominant part is permissible, then it is permissible. If they are equal, it is not permissible, giving preference to the prohibitive aspect."