How can I prevent mis-insertion of card direction by operator?
Actually whole PET card contains magnetic powder, so there is no direction physically. In other words, card data can be written from any direction. So it is better to consider the card design by marking arrow for the direction of insertion. And also, for software, reading data and verifying the format should be firstly process. Once data in magnetic strip is not read in correct format by your system, it is better to eject the card immediately without any data writing or printing.
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