Specificity is Your Friend
If I have sent you a confirmation that your laundry list of items is completed, do not respond back with a one line "this is not done'. If I have, in fact, made an error (I am not perfect, and I will own my mistakes), I now have to go back through the laundry list of items until I find one which was not completed, and have wasted a large amount of time I could have spent fixing your issue. If I have not made an error, I now have to go back through the laundry list of items twice to be extra sure I did not miss someting, and finally realize you probably just forgot to reload the page. I will then have wasted an even larger amount of time I could have spent fixing someone else's issue, who probably knows how to actually explain what they need.