Help! Sent 10 ZEC but 66.7 ZEC was deducted?

This is looking quite tragic for me :frowning: Any reason why this happened?

I sent 10 ZEC, that was received by the other account, however 56.7 ZEC was sent to an account I did not specify.

$ zcash-cli z_sendmany "t1RnU1sazBSEx8aBbuWR8sBYCJXhD7m8hcJ" "[{\"amount\": 10, \"address\": \"t1WS8copxxbbkyQhXJGMa1NrSM8CouxBb8p\"}]"

$ zcash-cli z_getoperationresult
    "id": "opid-fe958e92-c4a3-4f77-b8fd-4a1f76f97167",
    "status": "success",
    "creation_time": 1503613087,
    "result": {
      "txid": "08da262016b7e165471cbaf155bfbb388f9b6b18cc2463f95c365814ea162fd3"
    "execution_secs": 2.232603492,
    "method": "z_sendmany",
    "params": {
      "fromaddress": "t1RnU1sazBSEx8aBbuWR8sBYCJXhD7m8hcJ",
      "amounts": [
          "amount": 10,
          "address": "t1WS8copxxbbkyQhXJGMa1NrSM8CouxBb8p"
      "minconf": 1,
      "fee": 0.0001

As it turns out the remainer was deposited in a โ€œchangeโ€ account that was automatically created on my local wallet. Not great that it was not obvious, but I am glad the amount was not lost.

Good good !

Always remember to back-up your wallet and also make a back-up of the private key for the change addresses !