If you've decided to bring on affiliates to promote and sell your products, programs or services for a commission, then you're going to need an agreement that spells out the details of that exchange.
And you'll want your agreement to cover things like use of promotional materials, license to use materials, ownership and intellectual property, commissions, affiliate responsibilities and taxes, etc.
This agreement is the best way to make everything legal and above board when it comes to having affiliates promote your products, programs and services. Plus, it gives you the reassurance you need that even though they're promoting and selling your stuff, they don't have a claim on the ownership of those things. #winwin