Initialization is reading and writing to the card's underlying magnetic tracks, which you can't use at all. What it does is make the blank card encrypted into your card, and after it becomes your card you can do what you need to do with the card, write and modify it, just all the things you normally do. So he didn't initialize the card at all, you can't use it if you initialize it.
There is no need to do this, this is redundant (unless he has restrictions on the functionality of your software)
If there is no restriction, please rest assured that you can use it, you think about it as long as the amount of money in the card is good, the name is good on the line
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