Do you think Bruno asked for donations, just to see them get wasted for ever?
How about the scenario where a friend or a lawyer turns up to his daughter's doorstep - in many years from now - with our donations?
I believe we should not contact the family, but respect Bruno's final wish instead.
I also agree that we should not contact his relatives. Bruno knew his results in advance, I believe he had a lot of preparation. Including this one, I think we have been thinking too much about how to help him. Just donate and wait for the money to be used sometime in the future

(Or it is always there

). Anyway, the script is quite interesting, it's like a movie, but I don't think it will happen. His relatives may already know about this donation.