Before you begin to create paintings, learn his name. Many people as autograph use the first three letters of his name. The first thing to do is write these three letters on a piece of paper and see how you like them. Learn a few fonts and use them when writing these letters. Can these fonts combine to create an unusual composition.
If this option is you think too simple, try to create paintings to use capital letters your name, surname and patronymic. Write them in different ways, combine, rearrange, experiment and you will succeed.
Create a highlight in your signature in the passport. How to do it? For example, the end one letter to start the next and so on. This option will look quite original and interesting, especially if the writing of letters is unusual, with the use of combined fonts or just with your handwriting characteristics.
To make a custom signature, try a single letter to write inside another. This will make it easy enough that if autograph will be present such letters as "C", "O" or "E". Note also that if we are talking about a man's painting, the lines should be more strict, straight and clear. As for the female autograph, then you can unleash the imagination, to use all sorts of monograms, hooks, curls, etc.
For the effective completion of the signature, use a stroke similar to a cardiogram or something like that. It depends on how things will play out the hand. But don't overdo it, because the massive accumulation of lines must be guessed very essence of the autograph: what it means and to whom it belongs. It is also important that your autograph was compact and did not occupy the whole leaf. It is in your best interest.