I tried using a pre-paid card to buy something online a few years back: it didn't work, was specifically declined for being a pre-paid card (I don't recall what

I tried using a pre-paid card to buy something online a few years back: it didn't work, was specifically declined for being a pre-paid card (I don't recall what it was I was trying to purchase, but perhaps that may have some bearing on why it was declined if the reason was they don't want to sell certain things to potentially anonymous persons).