WHMCS uses cookies to maintain session state and store small amounts of data on visitors’ computers or devices. Cookies are small text files that most websites on the internet store on your device and use to improve your overall experience.

WHMCS uses two types of cookie:

  • Session cookies expire when you close your browser. They do not remain on your computer.
  • Persistent cookies stay on your computer for a defined period of time.
For more information, see Sessions.

Client Area Cookies

WHMCS creates the following cookies when you use the WHMCS Client Area:

WHMCSInstanceIDThis is the cookie that most PHP-based websites use. This stores the unique session ID for each visitor and enables variables to pass between page loads. The cookie only contains a reference to a session on the server. The user’s browser won’t store any personal information.Expires when the browser closes.
WHMCSAffiliateIDWHMCS uses this cookie to store the affiliate ID when an affiliate refers a customer to you. If the customer places an order within the next 90 days following the referral, the affiliate receives credit for it. It is a persistent cookie.90 days
WHMCSLinkIDWHMCS only sets this cookie if you use link tracking. It stores the link that the visitor followed to get to your website, and the system uses it to associate orders with a link to be able to provide conversion rate statistics. It is a persistent cookie.Persistent
WHMCSUserWHMCS uses this cookie if a client chose to have the system remember their details, ensuring that they don’t need to log in multiple times. It is persistent and lasts for 365 days or until logout.365 days or logout

Last modified: June 24, 2024