Non-Profits & Stripe account

https://support.stripe.com/questions/fee-discount-for-nonprofit-organizations 

Stripe offers a discounted processing fee for qualifying nonprofit organizations. Stripe's custom charity pricing structure is only applicable for organizations accepting donations (e.g. not selling products or tickets), and by receiving these discounted rates, your organization will be agreeing to primarily use your Stripe account for this purpose.

If your organization has nonprofit status and will be processing 80% or more of donation payments on Stripe, email [e-mail] with the following information:

• Your EIN, or a letter from the IRS designating your 501(c)(3) status

• Confirmation of the primary email address associated with your Stripe account

• Confirmation that greater than 80% of your payment volume will be tax deductible donations.