If you're the one paying the fee then it would be booked as an expense and you can call it whatever you like and record it in a way that makes sense to you. Is it a one time fee, a monthly fee, or an annual fee? Is it $10, $100, or $1000? Do you want to keep track of it separately or would it be okay to lump it in with other similar fees that you pay?
If the fee is large enough or you pay it every month, you may want to itemize it separately as "reseller partnership fee" so you can track it in your monthly reports. But if it's just $100 and not that important to you to track, then sure, you could classify it as membership fee or dues. The choice is yours.