Possible legitimate envelope opportunities could be some of the following.
You can stuff envelopes as an employee for your local print shop. These would not pay better than minimum wage and are not work at home opportunities.
Or you could start your own Direct Mail business sending newsletters, trade information, or anything else people are willing to pay for. This is envelope stuffing at its finest, completely legal, and probable a supplement to an existing business you are running..
As will be the them of this blog, you will not make easy money doing this (you might even lose some).
If envelope stuffing were that easy and if it were really legitimate, everybody would be doing it.
The ads you see in the newspaper or on light posts are not legitimate ways to earn money, they are schemes.
No business in their right mind would pay you to stuff envelopes at home. It costs less than 50 cents per envelope for this service, including the stamp. Receptionists do this in between calls at many offices and don't need for this service to be outsourced.
You only get paid for "stuffed envelopes" when someone else you recruit stuffs a self-addressed, stamped envelope with an up-front fee to get the same information that you paid for. You don't actually get paid for stuffing the envelope that is sent to others. You must generate sales or leads to get paid. This is the true definition of a pyramid scheme as they will go recruit users. Meanwhile, you are paying the person who recruited you for advice, leads, and supplies.
A great way to lose some money and not a legitimate work at home job.