The existence of an Islamic legal formula does not, in principle, preclude the use of mechanisms to protect the creditor's rights, in accordance with the regulations and the contract.
Key points
Multiple guarantees may be combined depending on the product and the risks involved.
For you, it is important to understand the function of each guarantee, when it can be invoked, and whether there are any assets or deposits held in lieu of the guarantor.
The figures, fees and limits in this answer vary by bank and change over time — confirm them with your bank or the official source before acting.