Is buying from a financial institution in Morocco — which claims to adhere to Sharia principles in its dealings but is affiliated with an interest-based bank and sells at double the purchase price — permissible or forbidden? And what are the conditions for a permissible purchase in Sharia?

It is permissible to deal with institutions that sell goods by installments if they own the goods before selling them, set the price at the time of the contract, and do not stipulate forbidden conditions such as late payment penalties. An increase in price due to installment payments is permissible, because deferred payment has a share of the price. The fact that the institution is a branch of an interest-based bank does not affect this, as long as it adheres to Sharia controls in its transactions. The conditions for sale are that the sold item must be permissible, pure, usable, owned by the seller, deliverable, and that the contract must be free of Sharia impediments such as gharar (excessive uncertainty), jahalah (ignorance), and riba (usury/interest).