GFM guarantees donations against fraud, X. They'll refund you if I turn out to be full of shit. Which I'm not, but of course, my word for that isn't any guarantee, objectively speaking, is it.
You give me a wallet address for a privacy coin we agree on, and I send a donation to it within minutes. However, I'd have to find my wallet keys first and download the wallets to my newest phone... so that could take awhile.