University of Illinois System
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Routing Vendor Invoices

The University of Illinois System is subject to and complies with the State Prompt Payment Act 30 ILCS 540 which mandates that invoices charged against state appropriated funds must be paid within 90 days of receiving a complete (proper) invoice. To avoid paying interest on late payments, units should process invoices promptly.

All purchase order invoices must have a valid and current purchase order number in order to be processed.

To expedite payments and prevent duplicate payments, all purchase order invoices must be sent to:
    University of Illinois
    Invoice Processing Center
    P.O. Box 820
    Rantoul, IL 61866

Vendors can email invoices individually to in .pdf or .tif format. Do not combine invoices into one attachment. Each invoice must contain:

  • A current, valid University of Illinois System PO number
  • A unique invoice number
  • Invoice date
  • Invoice total
  • Vendor remittance address

Purchase order invoices should never be mailed directly to a unit. If a vendor sends the invoice to your unit, forward it to the address above. Do not include an invoice voucher or your unit routing form as including these will delay processing.

The Invoice Processing Center scans and loads the invoices and supporting documents into the Banner Document Management System for processing by University Payables (UPAY).

State Prompt Payment Act 30 ILCS 540
Vendor Invoice Payment Process
Purchase Order Electronic Invoices (e-Invoices)

Last Updated: March 30, 2016 | Approved: Senior Associate Vice President for Business and Finance | Effective: September 2012