USA entities sometimes are not even aware that they have a fully functioning euro account able to receive fee-free SEPA bank transfers, simply as a mechanical consequence of having an euro-denominated account. In the past I've tested this: I asked the IBAN of an euro-denominated account from USA non-profits, got warned nobody ever sent money there, proceeded to send a donation anyway, had it work perfectly fine.
HOWEVER it's conceivable that the USA bank might end up charging some BS fees on their side just because they can. That's hard to control for.
HOWEVER it's conceivable that the USA bank might end up charging some BS fees on their side just because they can. That's hard to control for.