Hi, mesha, welcome to the forum. It is pretty much standard to provide your SS# to a mystery shopping company but NOT in an e-mail. Apply only on a mystery shopping company's website. The blue link at the bottom of the page, Official List of Mystery Shopping Companies, is a great list of legitimate mystery shopping companies to sign up with. Be prepared to go to the website of each one, fill out an application, provide your SS# and personal information, and sign a confidentiality agreement. Some may want you to take tests or submit a writing sample. After you are accepted as a shopper, you will be able to view their job boards. Best of luck!