He should be more afraid than you, since it is the person dong the filling who is most at risk in the case of a bad tank, not the consumer who got it filled.
Interestingly enough, when I got a fill card at a very well established shop in South Florida this year and showed up with the tanks I had just inspected, I was indeed asked who had done the inspection, and the employee had clearly never seen a sticker like that before. He was obviously dubious about filling a tank that was inspected by the customer. I explained to him that the new-to-him sticker was from a company called PSI-PCI, it was a legitimate inspector training company, and the inspector number on the sticker was my own. If I had walked in with a tank with a sticker from any local shop with no identity of the inspector, who could have been anyone with any level of training, there would have been no question. I went through the same thing the next day when there was a different employee on duty.
Unless it is PSI-PCI, in which case it is only good for a couple years, after which you must pay for a refresher.
