Always use delivery confirmation!

There's a new-ish eBay/PayPal scam out there -- people buy stuff you are selling on eBay, then claim it never arrived. Unless there is a delivery confirmation that is viewable online (regular USPS insurance doesn't count), PayPal sides with the complainant -- aka the scammer -- and you lose out.

More: http://www.kgw.com/business/money/stories/kgw_053008_news_paypal_scammers.457e8cfa.html

June 1st, 2008