There are commercial services which allows companies to query government's database to check a given CPF's situation. But they usually don't confirm that the n

There are commercial services which allows companies to query government's database to check a given CPF's situation. But they usually don't confirm that the number you give actually belongs to you. I always give a bogus, yet valid number (123.456.789-09). It's usually mapped to a customer, so somebody has already had the same idea or it's the remainders of a test database. They frown sometimes (actual CPFs follow very distinct number patterns) but didn't complain so far. They don't insist that you use a credit or debit card, which are much more common than cash over here. I couldn't confirm yet, but I suspect that they have access to some identification of yours whenever you use a card, so I usually pay in cash, which is pretty annoying because they never have change.