The City shall not disburse any funds for goods or services without the following:
A.
Invoice. The person claiming or receiving payment first presents a detailed bill of items or demand, specifying particularly how the bill or demand is made up with certification of the using department claiming payment that the bill or demand is correct; and
B.
Purchase order. The payment carries a written or electronic certification of some officer or duly designated employee of the City of Garfield having knowledge of the facts that the goods have been received by, or the services rendered to, the City.