From eBay:
If the email address you entered during your buyer or business registration cannot be used to verify your identity, you will be asked to place your credit or debit card on file. This usually happens for one of the following reasons:
- The email address came from a free, Web-based account such as a Yahoo! or Hotmail account.
- eBay attempts to send a message to this email address but the message is repeatedly bounced back to eBay.
eBay keeps your credit or debit card on file to safely and quickly verify your identity. Verifying some basic information about our members helps make eBay a safer place to buy and sell.
Your card will be used for identification purposes only and will not be charged at any time.
Remember: Your personal information is protected by eBay's
Privacy Policy and encrypted by the industry-standard SSL software.
If you don't want to place your credit or debit card on file, you might want to try registering with an email address from a company, school, or paid Internet Service Provider. Our automated system will determine by the email address that you use whether or not you would still require verification through a credit or debit card.
This information can be found at
http://pages.ebay.com/help/newtoebay/RegisterVerifyOrEmail.html
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I don't quite understand how you can do anything on eBay without sharing any kind of financial information??? I guess you must not be a member of PayPal either, then...