The Polytechnic Business Office Purchasing Center supports faculty and staff with procurement, invoice payments, and reimbursement processes.
Contact the purchasing center
- Email: KNOY-Purchasing@purdue.edu
- Important Reminder: Ensure emails are in the TO line, not CC’d, to prevent duplicate tickets.
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)
- Ensure it includes:
- Benefit to the project
- Approval signature
- Email the completed form to KNOY-Purchasing@purdue.edu
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
- Procurement Form (PDF)
- Procurement Form (Excel)
- GL Cheat Sheet (Commonly used GL codes—contact us if you don’t see what you need.)
Expense & Compliance Policies
- Summary Guidelines – Hospitality & PRF
- Hospitality Expenditure Policy
- PRF Guidelines
- Tax Exemptions Quick Reference
- Missing Receipt Form
Additional Resources