Answer:
Treasurer signs checks-Establishment of responsibility
Checks imprinted by a machine in indelible ink-physical control
Comparing check with approved invoice before signing-Independent internal verification.
Step-by-step explanation:
The fact that the treasure is saddled with the responsibility of signing checks underscores the control that the task is assigned signing checks is assigned to a responsible senior officer such as the treasurer.
However, putting an indelible ink on checks is a form physical control in that everyone that comes in contact with check can see that such control procedure has taken carried out.
Lastly, the comparison between checks and invoices ensures that the amount for which check is issued is in respect of genuine transaction and it is not overstated.