Here in Brazil you need to a go to a CAIXA bank branch (the name literally means "box") and speak to the manager to start the process. The money is deposited into the account within a maximum of 5 business days, but it usually takes less than 48 hours. Anonymity is guaranteed by law. No interviews, conferences, or public appearances. Nothing. But we've had cases of excited winners who told everyone they won and ended up being murdered. Here we have an "unwritten rule" that you should always collect the prize at a branch in a city far from where you are, because not even the local manager can be that trustworthy.