A world without credit cards is a world without e-commerce. Yet, credit card fraud online has become a costly problem. A federal law does protect consumers using credit cards, even online. It limits their loss to $50 in case of theft or misuse of their credit cards.

The real loser when an online credit card sale goes south is usually GullibleSeller.com. This column will attempt to teach sellers the basics for succeeding in the world of online credit card sales.