[chaosprime]

I don't think that'd work out well. There's an implied choice in "and/or", which is what the "neither - nor" language is meant to remove. We'd wind up with someone saying "oh, I don't accept payments, but I do accept donations, so that check box applies" -- or even the other way around.

I prefer the "neither - nor" because it's very inarguable, but "Payment/donations not accepted" would probably work.