Step 1: A vendor enters in a contract agreement with a government department in the form of a Purchase Order (PO) created by the department for a required service or product.

Step 2: The PO is printed in triplicate: the Vendor receives the 1st copy, the 2nd copy is sent to the Treasury Department and the Department keeps the 3rd copy.

Step 3: After the service or product is provided, the vendor gives the department an invoice. 

Step 4: The invoice is used to create a voucher for the vendor's payment.

Step 5: The documentation for the service or product is then sent to the Treasury Department for processing.

Step 6: The transaction is processed and "posted".

Step 7: The cheque is generated (on schedule) and printed.

Step 8: The cheque is logged in a ledger and awaits pickup by the vendor.