The NAI has created a global opt-out system in cooperation with its member ad networks. This solution has been tested on various browsers, platforms and operating systems. However, Web-based tools are not flawless.

The performance of the global opt-out tool might be affected by a number of factors outside the control of the NAI and/or its member ad networks. These factors include corporate network security, telecommunications breakdowns, browser settings, ISP or infrastructure anomalies and client-side technical glitches, among other possible issues.

If you experience technical difficulties during the opt-out process, we ask that you first try again. You may also try to opt out directly from any member ad network by clicking its link on the opt-out page.

In order for the opt out to work, your browser must be set to accept 3rd party cookies. Visit the links below for instructions on how to adjust your browser settings.

Internet Explorer 7.x and Internet Explorer 6.x http://support.microsoft.com/kb/283185

Netscape: See Firefox link below.

Firefox: http://www.mozilla.org/support/firefox/options#privacy

Safari http://docs.info.apple.com/article.html?path=Safari/2.0/en/ibr30.html

If you continue to experience problems, you can submit an email to the NAI. Provide as much information as you can, including operating system (Mac or Windows), Web browser, error messages, etc. Finally, you may report the problem by using the 3rd Party Enforcement Program operated by TRUSTe