It has to work sometime or they would stop doing it.I had a guy use 2 stolen credit cards at our place for parts.He had matching picture ID.When the office Mgr got the letter from Discover saying the card was stolen she brought it down to me and I said great he was just in and bought more parts,sure enough another stolen card.She said I needed to get a hold of him I was like good luck and about 10 minutes later he walked in the door to buy more parts.I called the Dublin Police(worthless idiots) who let him go because the cashier that witnessed him sign the receipts was not working and he could not hold him until she got there.The guy produced no ID, told the cops he had my parts but could not return them because he had allready started putting them on the car,but offered to pay with a credit card his friend would give us the number of over his cell phone.He stole $3000.00 in parts,told the cop he had the parts,produced no ID and was driving a rental car that was secured with,you guessed it,a stolen credit card.They towed the Rental car and gave him a ride off our property so he could wait for a ride home.That was a year ago or so.I recently got a call from the Franklin Co Court saying they had arrested him FINALLY but I would probably never see my money because HE HAD MULTIPLE CHARGES IN MULTIPLE COUNTIES.They'll let him out on bail and he'll go home to his country.