Is the university entitled to stipulate the forfeiture of a student's right to receive books and educational materials after a specified deadline, even though the student has already paid for them?

If the student has paid for the books, the university is obligated to deliver them to him, and it is not permissible for the university to forfeit his right to them while retaining the price, as this constitutes consuming people's wealth unjustly. If the university incurs harm due to the student's delay, it may stipulate a penalty clause that compensates it for the harm, such as requiring collection within a specific time, otherwise the student bears the harm resulting from his delay. This is because a penalty clause is permissible in financial contracts, except for those where the primary obligation is a debt.