Wait. The logo was on the back without permission to use or the permission to use wasn't on the back?
If the former, why didn't you cover the logo up instead of not using them?
If the latter, why not make a phone call and get a blanket permission via letter? They're donors, right? Which means they're doing it for publicity. Seems like they'd rather the logo be seen than pitch a fit about p's and q's. Right?
Whats the worst they can say? No?
So? Don't use it AFTER you have that firm and final no. You don't have that. You have a molehill you're working overtime on making a mountain out of.
Pick up the phone. Let your fingers do the walking.
(Universal you).
It's amazing to me some folks manage to tie their shoes in the morning. Good Lord.
Dint feel bad. I get a lot of the same over here. Boggles the mind.