When prisoners need loans after being released from prison, they usually need to provide security measures such as guarantors' collateral. However, specific loan policies will vary according to different regions and different lending institutions. You need to consult the relevant lending institutions for specific requirements. In some cases, where prisoners have a stable source of income and other credit background proof, some banks or lending institutions will consider providing unsecured loan services. However, this situation is relatively rare, and you need to specifically consult the requirements and policies of the relevant bank or lending institution.