When you get up early and check your email (still a little sleepy), you may get a surprise from PayPal like me. The subject is: Important issue. A transaction may have been made without your knowledge or consent. To see the details of this case, you should log in to verify account details. Once you follow the link, you will land to PayPal account page. What you need to do is to input all your banking and credit card information. If you are doing that, you are trapped either loose your money immediately or loose your banking information for sure.

Here is the email I received:
From: This e-mail address is being protected from spambots, you need JavaScript enabled to view it
Dear your email address,
We recently noticed that a transaction may have been made without your
knowledge or consent. We are currently investigating the following
transaction:
-----------------------------------
Details of Disputed Transaction
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Transaction date: Nov 29, 2009
Transaction amount: -$25.94 CAD
Your transaction ID: 30L88064FF065545B
Case number: PP-548-454-111

To see the details of this case, log in to your PayPal account by following the link below.

During our investigation your account access will be limited. Please verify your
account details in order to lift the limit on your account.

https://www.paypal.com/login?viewdetails?user=your email address &transactionID=2594

The seller has been asked to provide information about this transaction.
During this time the funds are not available in your account, but if the
unauthorized activity claim is decided in your favor, we will fully refund
you for the amount of the transaction.
Sincerely,

Account Review Department

Please do not reply to this email. This mailbox is not monitored and you
will not receive a response. For assistance, log in to your PayPal account
and click the Help link in the top right corner of any PayPal page

If you are not that sleepy and read it carefully, you will find the fake points. First, PayPal will call your name instead of your email address. Second, have you found the URL is not PayPal any more when you click the link. For me, it is transferred to a Korean website. Third, just suddenly realize that this email address is not my registered PayPal account email address.

So be alert at those online traps. If receive unknown, suspicious emails, simply deleted. Usually, big name companies, such as PayPal, Amazon, seldom send emails to customers if you do not subscribe. When your banking information is requested, make sure that you are on your trusted websites (take a look at the URL address) and you are transmitted through SSL (look at the URL, it is https, not http). Your password should be hidden in star or dot format. Online shopping is a joyful experience if you can take care of your online safety.