No, you can use the private key for example on blockchain.info walltet or even on your QT-Client !
I am using these "Banknotes" for Paper Wallets already, like the design, we need a similar one for LiteCoin! -> http://address.litecoin.net/
I meant in a comfortable way. I want to scan it with a smartphone.
download the blockchain.info app you can scan it with a smartphone, when I do person to person sales they scan my smartphone with their smartphone.
hmm. Could you give me a hint how I can scan a private key with the blockchain.info app on Android? I can't seem to find this particular feature.