After donating, if the GET parameters paymentId, token and PayerID are still set, you can reload the page (make the GET request over and over again) and the donation will appear again in the donations hall of fame (as many times as the GET request is being made).
Bug
After donating, if the GET parameters paymentId, token and PayerID are still set, you can reload the page (make the GET request over and over again) and the donation will appear again in the donations hall of fame (as many times as the GET request is being made).
Here is the bug shown.