Vendor Information

Maricopa County utilizes the Advantage Vendor Self Service System. Vendors have the ability to self-maintain their business information online.

VSS Users: Due to recent updates in the Chrome web browser, the VSS system is not currently working properly when using Chrome. Please use a different browser, Firefox, IE, Safari, etc. while this issue is being corrected.

Also, the VSS system will be upgraded to VSS 4.0 and users will have a new and enhanced online experience. The VSS functionality will remain the same and the online pages will look different and be more user friendly The VSS system will not be available from Thursday, July 2nd at 6:00 pm through Monday July 6th at 6:00 am during this upgrade. There will be a new website address after the upgrade to use the VSS 4.0 system and using the Chrome browser is preferred. Users will be automatically redirected to the new website and the new website link will be posted on this webpage when the VSS 4.0 system is live. Your current user credentials will remain the same after the upgrade.


While the agency intends to maintain continuous access to this web site, from time to time access to information and/or documents may be interrupted or prevented either because of site problems, user problems or internet problems. Not all access difficulties can be resolved by the agency since some access failures may be due to the type of computer or communication equipment and services employed by the web site user.

Advantage Vendor Self Service

If you are trying to register as a vendor with Maricopa County and your business operates outside of the United States, please send an email with your name, business name, mailing address and telephone number where you can be reached.