Indiana Code Title 36. Local Government § 36-4-8-7

(1) supported by a fully itemized invoice or bill under IC 5-11-10-1.6;

(2) approved by the officer or person receiving the goods or services;

(3) filed with the city fiscal officer;

(4) audited and certified by the fiscal officer before payment that each invoice is true and correct; and

(5) allowed by the city legislative body or the city board having jurisdiction over allowance of the claim.