Maybe you have seen a lot of job posts, similar as following, at many websites.
For example: DATA ENTRY, 300-500 DOLLARS A WEEK.
If you contact to the employers, these employers will tell you that you need to send money for training materials or other materials. If you send them money, what you get is a 3 pages letter which tell you how to post an ad to get other people to give you money, FOR NOTHING! It is a huge scam. Of course, not all data entry jobs are scam. However, beware all jobs that ask your money first!
Questions to Ask
Legitimate work-at-home program sponsors should tell you - in writing - what's involved in the program they are selling.
Here are some questions you might ask a promoter:
The answers to these questions may help you determine whether a work-at-home program is appropriate for your circumstances, and whether it is legitimate.