Just want to report a person experience with error code 203. I bought the cards a while ago (a few weeks) and tried to load them today. I'm out of town. Got the 203 error code. REad the previous paypal thread and someone speculated that it may be geographical. So, I used my vpn to go to a location near my home where I purchased them, and then the load worked fine.
Best of luck to anyone else with this problem, I was worried I'd be sending in receipts, but the location fixed it.