Proper segregation of duties requires that
The receiving clerk signs the purchase order
Purchase requests are generated by the purchasing agent
Bank reconciliations are not done by those in charge of disbursements
The purchasing agent does not prepare purchase orders
Physical control over those in charge of disbursement would be:
Bank reconciliations are performed timely
Proper authorization by a supervisor
Proper review of timecards are established
Employees in charge of cash disbursements are bonded
