Re: a "software-generated voicemail message"
One of our IT guys got one of the "help, I've lost my passport and I need $$$ to get home" calls from a "close friend".
His reply was "sure, I'll go right down and send you the money as soon as you tell me the name of the play we were in the last year of high school"
Cue protestations on the part of the scammer, while our guy calmly promised immediate transmission of the money after the answer to the question was provided. Needless to say, the scammer eventually gave up.