There is a little system I use for this that works REALLY well

I am not going to tell you what it is, but I will hint, and hopefully it will get you thinking about what it might be, and how it works. I don't broadcast it openly, but feel free to guess. If someone guesses what it is, then I will PM them to let them know.
Sorry about the cloack and dagger appearance, but my belief is down the 'teach a man to fish and he eats forever.
or as I prefer to say (as a joke) , sell a man a fish he will eat that day, teach a man to fish and you have just lost your best customer unless you diversify into fishing equipment
Ok my clue is the answer is in writing something that solicitors need to have! (cryptic clue) So c'mon great minds start guessing