described by subject type: Rahn al-manqul (moveable (manqul) property, such as vehicles), Rahn ghair al-manqul (immoveable property (ghair manqul), such as land, buildings). Wakalah A Wakalah is a contract where a person (the principal or muwakkel) appoints a representative (the agent or wakil) to undertake transactions on his/her behalf, similar to a power of attorney. It is used when the principal does not have the time, knowledge or expertise to perform the task himself. Wakalah is a non-binding contract for a fixed fee and the agent or the principal may terminate this agency contract at any time "by mutual agreement, unilateral termination, discharging the obligation, destruction of the subject matter and the death or loss of legal capacity of the contracting parties". The agent's services may include selling and buying, lending and borrowing, debt assignment, guarantee, gifting, litigation and making payments, and are involved in numerous Islamic products like Musharakah, Mudarabah, Murabaha, Salam and Ijarah. Types of wakalh include: general agency (wakalah 'ammah), specific agency (wakalah khassah), limited or restricted agency (wakalah muqayyadah), absolute or unrestricted agency (wakalah mutlaqah), binding wakalah (wakalah mulzimah), non-binding wakalah (wakalah ghair mulzimah), paid agency, non-paid agency, etc. An example of the concept of wakalah is in a mudarabah profit and loss sharing contract (above) where the mudarib (the party that receives the capital and manages the enterprise) serves as a wakil for the rabb-ul-mal (the silent party that provides the capital) (although the mudarib may have more freedom of action than a strict wakil). Deposit side of Islamic banking From the point of view of depositors, "Investment accounts" of Islamic banks—based on profit and loss sharing and asset-backed finance—resemble "time deposits" of conventional banks. (For example, one Islamic bank—Al Rayan Bank in the UK—talks about "Fixed Term" deposits or savings accounts). In both these Islamic and conventional accounts the depositor agrees to hold the deposit at the bank for a fixed amount of time. In Islamic banking return is measured as "expected profit rate" rather than interest. "Demand deposits" of Islamic financial institutions, which provide no return, are structured with qard al-hasana (also known as qard, see above in Charitable lending') contracts, or less commonly as wadiah or amanah contracts, according to Mohammad O. Farooq. Restricted and unrestricted investment accounts At least in one Muslim country with a strong Islamic banking sector (Malaysia), there are two main types of investment accounts offered by Islamic