Is the penalty clause which stipulates that all bonds become due upon delay in paying any installment considered a late payment fine?

A "fine" is a loss, and in financial terms, it is what is required to be paid as a disciplinary measure or compensation, or it is the legal penalty resulting from a violation of the law. The Islamic Fiqh Academy has permitted penalty clauses in all financial contracts, except for contracts where the original obligation is a debt, as this constitutes clear usury. The Academy also permitted the acceleration of all installments upon the debtor's failure to pay any due installment, unless the debtor is in financial hardship. Therefore, the stipulated condition is valid.