[jedberg]

Why not send a small postcard with the license key that requires them to sign to get the postcard? Give them an instant key good for 14 days and then make them use the one on the postcard for long term use. Then you'll have your proof (and be pretty close to PayPal's chargeback limit)

[bitJericho]

You don't need to send him a different key in the post. Give him the key digitally and send the same key via post.

[jedberg]

The reason you don't want to do that is because they can just reject the postcard. That's why you have to give them needed info on the card. The point of the temp key is so they can get immediate satisfaction.

[bitJericho]

You could offer other services that having access to a valid key gives you, such as support, updates, community, so on.

[velik_m]

That's a pretty good idea, customers might even appreciate the "thank you" note. You do need to get their address though.

[jedberg]

Which is an extra layer of fraud protection. :)

[lincolnq]

If I bought software and they were going to send me a postcard with a license key, I would be pretty annoyed.

[jedberg]

Why? You'd get one via email right away, you'd just have to enter the one from the postcard when it arrived.

[dragonwriter]

> Why not send a small postcard with the license key

Sending a postcard with a license key certainly gives someone the license key, but whether its the person to whom it is mailed or not is less certain.