I want to sell some shares (haven't done so ever) and my online broker is CommSec. Just want to make sure that i'm doing the right thing. If a put in an At Limit Sell Order...say $1.50, does this mean that it will only sell once someone is willing to pay $1.50 or more, nothing less. Also Commsec asks me for an SRN (if applicable)....do I need to fill this on....if you are with Commsec....aren't you on HIN....which I am. Also, I only bought the shares a couple of days ago....do I need to provide any sort of record within Commsec to identify that i've actually owned the shares....or it will automatically know as it's tied to my account. Also, just out of curiousity....what happens if I entered a quantity by mistake and processed the order....but i actually don't have enough shares to sell. Will it automatically know....?