An excerpt: "...Before finalizing your gold sale, get the entire thing down in writing. Later on, if there's any sort of problems related to the sale, you'll need this signed written document at the ready to prove your case. If you don't have it, you may find that proving any sort of fraud will be nearly impossible.
When you are buying or selling gold to another person, make sure you are keeping yourself protected agaisnt identity theft. Avoid giving out your personal financial information. This includes bank account numbers, credit card numbers and Social Security numbers. Take special care to not give out this type of information, especially over the phone to people that you don't know...."