How to turn off "change" address in bitcoind? I would like to keep backup of my wallet on paper, but that's impossible or at least impractical when the bitcoind keeps creating new addresses for "change". I know it is possible in theory to do it by sending the change back to the sending address. And I know there are privacy implications when doing this. But I care more about security than anonymity in my case.

Is there an option to turn off "change" addresses in bitcoind (the original Satoshi client)?
Bitcoind isn't designed for that. There isn't option for that and probably won't be. If you are interested in keeping paper backup, you should look at clients such as Electrum.