you hand bitcoin to the service.
the service privately sells the bitcoin for fiat on exchanges to refill its fiat reserves,
the fiat reserves the service have are used to topup/charge/load the debit cards
but all the customer see's is that they hand over bitcoin and get credited fiat on their card
Allright, do you know any company that provides this kind of service? What are the fees?
Thanks
If you are from the EU, you can check XAPO as well, they have a bitcoin debit card directly linked to your bitcoin wallet, so they do the exchange on the fly when you use your card, you don't need to top up your card every time. Their support is always overloaded, you can check about them in the bitcointalk forum as well, they have their own thread.
https://bitcointalk.org/index.php?topic=902526.0