What is the ruling on Islamic Certificates of Deposit with a return at the end of three years or at the end of each month, issued by the International Islamic Bank for Investment and Development in Cairo?

The information indicates that 10% of the shares of the aforementioned bank have become owned by interest-based banks. The questioner should verify this. Based on this, if the deposit is subject to the laws of the banks that bought its shares, then it is impermissible due to its inclusion of prohibited usury (riba). Islamic banks vary in their adherence to Sharia (definition) depending on the capacity of their Sharia board and the seriousness of the management in implementing its decisions. A Muslim is required to seek out what is lawful and avoid what is unlawful.