Paypal just wants you to sign up for an account.
On a related note, if your non-profit is working with Paypal Giving Fund, they will not have to pay any processing fee (and even receive 1% more during the holidays) if you donate through Paypal Giving Fund. The downside is that if your non-profit is not working with Paypal Giving Fund, Paypal can send your donation to a "charity of similar purpose".