Actually, I just tried it, looking whether I could find Orienteering USA, and I found the US Orienteering Federation, as an acknowledged charity I could make a donation directly from PayPal, but at the same time it showed it as unverified in terms of being able to donate that way.
Apparently if one makes a donation via PayPal to a charity, one can then set it as “set favorite charity”, but it is not clear whether I could do that for an unverified charity, as it says "Charities enroll in PayPal Giving Fund and are automatically listed in the PayPal app and on PayPal’s fundraising site, making it easier for consumers to find charities and donate."
I'm thus not yet sure I want to give it a try if it were then not going to go to OUSA.
I know, maybe only tiny amounts, but I know how much my grocery coop store raises every week just from the customers choosing to round up their purchase to the nearest $.
Andrea