Beware. There's a product out there that claims to be your flexible friend, but could end up as nothing more than the gremlin in your pocket.

This beast is known as a "prepaid debit card", and is basically a "pay-as-you-go"-style payment card. You load money onto it, then you spend the money again. It's touted as an easier way to pay, being able to use contactless payments for smaller amounts, and negating the need to carry big sums of cash around for those bigger purchases.
The price of this convenience?
£5 to buy the card. Not a lot, no?
Just wait until you try to withdraw some of your money from a cash machine. Even in the UK, you'll be hit
2.95% of the amount you're taking out as a charge. What if you want to change your PIN? No problem - that'll dock
20p from your balance each time you change it though.
Of course, you'll need to have loaded some money onto the card in the first place. Depending on the method you use to get the money onto it, you'll possibly end up being charged
£1.50 or 4% of the amount for the privelege.
If there's a problem, or you've got a query, you'll probably like being able to call a customer service rep and get it sorted out. They're waiting at the end of the (premium-rate) line, to hit you for
50p a minute to speak to them. And they'll happily take another
£5 for a replacement card if you've lost yours.
Now, somebody please correct me if I'm wrong, but I don't see the point in this particular product. It just seems like an unnecessary money drain, and it does nothing that, for example, the
Barclays Basic Bank Account (or a similar product from another bank out there) would provide for free. Even if you've got a dire credit rating, you can still get a basic bank account with no hassle - the law says so.
So why would anyone actually want one of these prepaid cards?
When you find out, let me know.