A phone thief may be watching with binoculars from across the mall and you'll suddenly find many long distance calls on your next bill. Should this happen, call your phone company immediately, if they have not already called you. Don't think fax machines are secure. Then you discover that another fee is required before you can make your reservation. And you still have to pay the telephone charge for using the 900 number.
Third party calls A secretary who works in law enforcement got a call at home one evening.
The girl pressed Y, and waited. After about ten seconds, she hung up. But on her next phone bill was a half hour call from a place she'd never been calling someone she'd never heard of. The only way to catch the perpetrator of this scam is to catch him in the act. Then the scammer can dial in a number to charge the call to.