Are the profits from investment certificates lawful or unlawful, and what should be done about them?

All Fiqh conferences have ruled that investment certificates are usury (riba) and strictly forbidden, in all their forms. If the certificate includes prizes (Category C), this further increases its impermissibility. Therefore, you must repent to Allah, withdraw its earnings from the bank, and spend them on charitable causes, as they are not permissible for you.