[Someone]

In Italy, that’s law because there used to be/is (don’t know which is true) a culture where, some/many cafes and restaurants let some/many visitors pay ‘under the table’, dodging VAT taxes.

That law requires shipowners to give a receipt and customers to keep it. Customers can be fined if, a few meters outside the shop, a policeman asks them to show their receipt, and the policeman has evidence they bought something or some service (https://www.accountingbolla.com/blog/sales-tax-in-italy-iva)

[isbvhodnvemrwvn]

In Poland the tax office clerks just go shopping and if they are not offered a receipt, the store will be heavily fined. The customer is not liable, but the shop is, so pretty much everyone will offer you a receipt immediately.