I almost fell for this, I have an Adsense account and hadn't setup the payment details. Thanks to my PayPal Alert for alerting me, I was getting ready to pass on my account details!!!
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Dear Advertiser,
We were unable to process your payment.
Your ads will be suspended soon unless we can process your payment.
To prevent your ads from being suspended, please update your payment information.
Please sign in
to your account at
http://adwords.google.com/select/login,
and update your payment information.
We look forward to providing you with the most effective advertising available.
Thank you for advertising with Google AdWords.
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The Google AdWords Team
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