I received a Cashier's check that I was to use to perform tasks as a mystery shopper. I deposited the money in my own bank account, waited a couple of days, and assuming the check had cleared proceeded to use the money to perform my "tasks." Two days later the check came back to my bank saying the account number was invalid. In the meantime, I have tried over and over to use the above phone number to contact the party that I dealt with and he will not return my calls. I have contacted the local police who have told me to send a certified letter requesting the money, however, I do not have a valid address, only a phone number. When I did a reverse search of the phone number it was linked to Fidos.