One that's totally out in the open is US entry visas. If you're from outside the US, you have to fill in a government form that looks pretty old school. There a

One that's totally out in the open is US entry visas. If you're from outside the US, you have to fill in a government form that looks pretty old school. There are "services" that look better and turn up in searches, and will simply forward your info. I ended up using one by accident and luckily they simply paid it back immediately when I emailed them, but my hunch is most people don't detect it or don't bother to try to claw back the money.