 Umar was known for this intelligence service through which he made his officials accountable This service was also said to have inspired fear in his subjects.On discovery of any scandal on the part of any official, an investigation through a special department of accountability headed by Muhammad ibn Maslamah would be carried out and if the official would prove guilty he was immediately deposed from his office and his punishment was vary from publicly humiliating punishments to flogging.Before appointment, all financial assets and details of the political officer used to be recorded and were checked each year.