Adding your signature to a painting is like adding a creation tone    to it that reads "finished". It's a sign that you're satisfied with the painting and no longer consider it a work in emulsion stuff .

Is It Really Necessary to Sign a Painting?
It's not a legal requirement, but if you don't add your copy point  to a painting, how will anyone know who the artist is? You may argue that you've a very familiar style that people will recognise, but what if it's the first time someone's encountered your work? How will they find out who the artist is then? If it's hanging in a gallery it'll have a label with your name on it, but what if it's in the lounge of someone who's bought a classicality and they can't remember who the artist was? Think about the works by famous artists which are 'rediscovered' every now and then; is this a fate you want to risk for your paintings?

What Should My Signature Look Like?
The most important Protect  pet  portrait is that people must be able to read it. An illegible signature isn't a sign that you're extremely creative and it doesn't add a level of intrigue to the painting. You're the artist, so let it be known. But at the same time, don't make it look like you're using a stamp. You don't have to sign your whole name on the front of the photos into painting, you could just put your initials but it's wise to put your full name on the back of the painting. The same applies if you use a symbol or monograph; people have to have some way of knowing what it stands for.