Purchasing Center

The Polytechnic Business Office Purchasing Center supports faculty and staff with procurement, invoice payments, and reimbursement processes.

Contact the purchasing center

Purchase & Payment Requests

Pay an Invoice

Submit the following to your business office or email KNOY-Purchasing@purdue.edu:

  • Completed purchase request
  • Invoice
  • W-9 and payee certification (for individuals) or W-9 (for companies)
  • Backup documentation

Place an Order
Complete the Purchase Request Form (Form 12)

Reimbursements
Provide the following to your department business office:

  • Itemized receipts
  • Substitute W-9 and payee certification (for individuals) or W-9 (for companies)
  • Backup documentation

Purchasing Systems & Guidelines

Ariba (Self-Service Procurement System)
Faculty, staff, and students with a paid appointment can be trained to use ARIBA for procurement. Benefits include faster processing times!

  • Interested in ARIBA training? Email your business manager to request training.

Amazon Business

Purchases Over $10,000 (With Competitive Bid Process)

  • Complete the Request for Purchase form
    • Use your personal information in Section 1 (customer contact)
    • Include the funding type (if known)
  • The form routes for approval, creating a WS# (required to proceed).
  • Once the WS# is received from Central Procurement, submit the full purchase request to KNOY-Purchasing@purdue.edu, including:
    • Form 12
    • Quote
    • WS#

Purchases Over $10,000 (With Bid Waiver)

  • Complete the Special Purchase Form (formerly the waiver of competitive bid).
  • Obtain department head & business office approval (with a physical signature).
  • Include vendor contact information & account number(s) to charge.
  • Follow the same WS# approval process as outlined above.
  • Submit all documents (Form 12, Quote, WS#) to KNOY-Purchasing@purdue.edu.

Purchasing Forms & Resources

Frequently Used Forms

Expense & Compliance Policies

Additional Resources