Accounts Payable

For vendor questions regarding the status of payments, please contact the contracting department directly.


All vendors are required to submit an Internal Revenue Service (IRS) W-9 form (PDF) to the City. For questions regarding the IRS W-9 and/or IRS 1099 forms, please contact the Department of Financial Services at 949-425-2522.

Vendor Registration

Please send a letter of interest to:

City of Aliso Viejo
Attention: Financial Services
12 Journey, Suite 100
Aliso Viejo, CA 92656

In the letter, supply the City with the:

  • Name of Your Company
  • Contact Person
  • Telephone Number
  • Address
  • Description of the Type of Services/Products You Provide

This information will be added to an informal list maintained by the City and kept on file for a period of one year. Should the need arise for the products or services you provide, your name will be supplied to the department seeking your services. Visit the City’s website for a current list of outstanding requests for proposal (RFPs) and bid opportunities for City projects.