Writers Beware!
After all this has been established, you'll be asked for your address and phone number (which you'll refuse to give, obviously). Plans will be made to send payment to you, but at the last minute, you'll be told that the money has to be sent by cheque because the person doesn't or couldn't open a paypal account. You'll then be forced to grudgingly give your postal address because you've started the work, and want to be paid for your time.
Up to here: this happened to me. I had a gut feeling it was a scam and even asked my husband what I should do about it.