How do I disable my lost iPas.

Are you able to locate the old iPad using Find my iPad? Log into icloud.com and try. If so, you can wipe it from there. If not, there isn't any other way to disable it.

To be safe, I would change your Apple ID passwords and your iCloud password. Also, if you have any password connected with apps that were on the iPad, you could change those as well. And if you use the Kindle app, you can deregister the iPad as a "kindle device" on amazon.com.

These links may be helpful.

How to Track and Report Stolen iPad

http://www.ipadastic.com/tutorials/how-to-track-and-report-stolen-ipad

Reporting a lost or stolen Apple product

http://support.apple.com/kb/ht2526

Report Stolen iPad Tips and iPad Theft Prevention

http://www.stolen-property.com/report-stolen-ipad.php

How to recover a lost or stolen iPad

http://ipadhelp.com/ipad-help/how-to-recover-a-lost-or-stolen-ipad/

How to Find a Stolen iPad

http://www.ehow.com/how_7586429_stolen-ipad.html

Apple Product Lost or Stolen

http://sites.google.com/site/appleclubfhs/support/advice-and-articles/lost-or-st olen

Oops! iForgot My New iPad On the Plane; Now What?

http://online.wsj.com/article/SB10001424052702303459004577362194012634000.html

How to Find Your iPad Serial Number

http://www.ipadastic.com/tutorials/how-to-find-your-ipad-serial-number

 Cheers, Tom 😉