Sometimes Snopes does sort of get it sort of wrong. An example of this concerns a chain-email which has been doing the rounds in the UK for the last three years. This concerns a story about receiving a postcard from a courier company asking you to phone them about an undelivered parcel. The email then goes on to say that when you do phone that number you are immediately charged £15, and there is no such parcel waiting for you.
There is an element of truth in this story, but not the part about the £15 charge. Back in 2005 a company was running such a scam but you had to stay on the line for six minute and you were charged £9, This company was closed down that same year and fined several thousands of pounds.
If you check this story on Snopes it says right at the top"true", but only because this scam did sort of happen. But you have to scroll down the page to discover that the scam is no longer operating and there was never a £15 instant charge. Thus people have gone to Snopes, seen the “True” tag and have not only believed the legend, but have passed it on all over the net.
I prefer Hoax-Slayer. At the top of their page dealing with this same urban legend you see this :-
Was true, but the scam was shut down in late 2005.