traveller, on the theory of probability, this author has not yet been counterfeited.
Ie if visually and by touch (the method of spear with a needle) the age of your work draws on 35 years and older, it is guaranteed to Hans Figura (1898 - 1978).
As the buyer will pick up work for a second time - by arrangement. The primary question of money.
It is important to trigger the principle of Ilf and Petrov - money in the morning, evening or night painting the money in the morning (next day) the picture.