Make them log in: and to register they need to provide a credit card or paypal.
The logging in is pretty trivial:
MSDN: Introduction to Membership[
^] gives a good tutorial.
The problem is with getting the money. That's not complicated - well, not too complicated - it's the security you need to deal with to ensure that nothing "bad" happens that make it difficult. Start by talking to PayPal, they are used to this and pretty helpful. But do not, ever, ever, accept code from a insecure website to handle anything to do with real money.
You do not know who is giving you the code, you do not know what it does, you do not know that it places the monies correctly into the appropriate account, without passing the details to any third parties.
Only get such code from reputable card transaction service companies (or PayPal) - the scope for fraud otherwise is far too large. And remember, you personally could be liable for any monies lost if your action is seen to be negligent - which getting your code from a public forum would most certainly be!
So don't expect us to tell you that bit, or even give you a link - after all, you don't know that the link even takes you to the right place! :laugh:
Submit an article or tip