Individuals are NOT eligible for nonprofit prices; also, not every organization is eligible, even though you may think it qualifies based on the list above. For example, business leagues, chambers of commerce, social and hobby clubs, and certain political organizations usually are NOT eligible.
Your organization may apply for and receive nonprofit authorization, but you're not quite finished -- there are restrictions as to what may be mailed at those prices. For instance, there are restrictions on the amount and kind of advertising you can do. It’s always best to check with your local business mail entry staff before you design and print your mailpiece.
In addition to your local business mail entry unit, Publication 417, Nonprofit Standard Mail Eligibility provides complete information about nonprofit eligibility, including the types of materials that may be mailed at the Nonprofit prices and instructions for applying for nonprofit mailing privileges
How to apply for permission to use nonprofit prices?
Calculate your nonprofit postage
How to prepare a nonprofit mailing