Have you ever recieved money in the mail from an anonymous person?

I often think of doing something like that for someone - and now I will take the impulse a bit more seriously, knowing that you found it heartwarming and not creepy. I always worry that people will take it as a put down if they are given money when they are having a hard time, and don't want to add insult to injury. My parents had it rough financially, and would have been insulted by such a gesture. It would have meant that we were not keeping our "shameful secret" well enough.