I'am very confused. I just read on the most popular services for paper wallets that "You should always spend all the funds on a paper wallet, not part of it or you will lose the rest" . It links back to a reddit discussion with a short explanation that I don't really understand. Apparently it has to do with change addresses. This sucks.
In the last 3 months I've been using paper-wallets for several transaction of partial amounts without loosing anything. I generated privatekey + public key with vanity gen, imported the read-only public address into blockchain mobile app, and went on spending (scanning private key at need) and receiving on that very same address. Am I being lucky, wrong, or what? I really don't get it
I also printed several paper wallets for friends and workshops and after being imported (electrum, blockchain.info app) I saw people making partial transaction without losing the other part.