The FDIC updates known counterfeit Cashiers Checks by name and bank location online.

If you as a seller receive a bank-type Cashiers Check, you may want to view these pages from the FDIC to read about known fake cashiers checks in circulation:

NOTE: YOU NEED TO COPY AND PASTE THE LINKS BELOW BECAUSE EBAY DOES NOT ALLOW LINKS N THEIR GUIDES)

For Canadian and USPS Postal Money Orders, please see this eBay guide:

http://reviews.ebay.com/Canada-USPS-Fake-Real-Money-Orders-Security-Feature_W0QQugidZ10000000004065253