How Can I Get My Adsense Account Back?

If Adsense cancels your adsense account they probably have a very good reason. However if you feel that a mistake has been made you can appeal adsense's decision.

Here is an excerpt from one of Adsense's pages regarding appealing to get your adsense account back:

As you know, Google treats instances of invalid clicks very seriously. By disabling your account, we feel that we have taken the necessary measures to ensure that invalid clicks will not continue to occur on your site. Due to the proprietary nature of our monitoring system, we're not able to disclose any specific details of these clicks.

Publishers disabled for invalid click activity are not allowed further participation in Google AdSense. However, if you can maintain in good faith that the invalid clicks we detected on your ads were not due to your actions or negligence, or the actions or negligence of others working for you, you may appeal the closing of your account.

Google reserves sole discretion in considering whether to take any action on an appeal.

In order to appeal the disabling of your account, please supply us with the details requested below. We're unable to consider appeals that do not contain all of this information:

You can go to their site directly using the link below to get to their form to "appeal" their decision

https://www.google.com/adsense/support/bin/request.py?contact=invalid_clicks_appeal

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6/16/08 Update!

Here is the latest information about how you can appeal your adsense account being disabled:

Can my account be reinstated after being disabled for invalid click
activity?

We're always willing to work with you to resolve any issues you may
have. If you feel that this decision was made in error, and if you can
maintain in good faith that the invalid activity was not due to the
actions or negligence of you or those for whom you are responsible,
you may appeal the disabling of your account.

To do so, please contact us only through our online appeal form.

Once we receive your appeal, we'll do our best to inform you quickly
and will proceed with appropriate action as necessary. Please
understand, however, that there is no guarantee that your account will
be reinstated.

Please also bear in mind that once we've reached a decision on your
appeal, further appeals may not be considered, and you may not receive
any further communication from us.