This has happened before in my life when clients, with obvious symptoms of paranoia, accused me of cheating. In fact, we, the croupiers, are forced people, we mix the cards not as we want, but as we are ordered by the instructions adopted in all decent casinos in the world https://www.onlinecasinosvizzera.com/. A good manual shuffle is not a quick process, unlike a machine shuffle, it contains at least three steps. I don’t like it, but they need to be done: circular mixing - five times or more, then strip shuffle - this is throwing small blocks of cards among themselves, and at the end - rifl shuffle, which resembles a quick flipping through books when the cards are in the right hand and in the left click they stick into each other, forming a single whole. From the outside, of course looks suspicious.