If someone needs "proof" of something that you know is true, you don't need to work for them and it's likely some kind of "dance for my entertainment" rather than a genuine "I'll hire MB, but only if he can prove this one thing with paperwork."
If someone needs "proof" of something that you know is true, you don't need to work for them and it's likely some kind of "dance for my entertainment" rather than a genuine "I'll hire MB, but only if he can prove this one thing with paperwork."
I had a fairly senior hiring manager for an investment bank call me a liar to my face, basically because he couldn't understand how a consultant can have more than one client at once, and so my CV is non-linear! I dodged a bullet there.
Initially Google used to send US cheques, in USD. So I had to go to the bank to deposit those in my personal account, which required a branch manager to sign it because 1. Who is Google and 2. Why is someone getting a large-ish cheque from a company overseas (AML laws).
Anyway, at some point I've decided to incorporate a company. Trying to explain to my accountant what my company was doing (online publishing), and trying to explain to the bank this was not a money laundering operation required some effort.
People had no idea that one could make money on the Internet.
Advertising for them had to fit in a TV, billboard, radio or cinema square. Anything else was science fiction.
I then left my 17-year full-time as a mainframe developer (yep) to run my company full-time. You can't imagine the run around I had when I tried to find a home loan for our first home a year later - how do you make money? was always the question. It didn't matter that my answer was "I am the owner/director of a company". They wanted to know what my company was doing and just "online publishing" wasn't enough. Even with tax records and everything.
So I empathise with the OP on how to demonstrate skills and experience while being self-employed.