For a small seasonal business that’s substantial.
For example if you give a receipt and the customer misplaces it on the way out and can’t find anymore, you’re liable for tax evasion. Never mind that the POS has its own registry they can check. For the authorities, “you didn’t give a receipt, so they can’t tax you.”
When the restaurant was opened about 20 years ago, all sorts of departments came to check it out and suggest whatever ridiculous change.
Food safety in Italy however is probably among the best in the world due to this.