I'm wondering if I can open up a local shop and sell bitcoins for cash without paperwork or signing anything. Sure a bitcoin ATM can fulfill that role but as a shop I could do other things such as sell bitcoin merch etc, offer information on bitcoin and cryptos etc, but primarily I'm wondering if I can sell bitcoin for cash without hassling customers with paperwork. I suppose the laws would be the same for an ATM machine? which I haven't heard to be of a legal problem. I'd be considering doing this in Texas, USA, by the way. Any references or shared knowledge would be great, and I'm less interested in speculation. Thanks!
This is impossible because every business and establishment will be required a license to operate or else it will be illegal specially bitcoin exchanges. If bitcoin is legal in your country, all exchanges will be part of the regulation in which every bitcoins transactions will be strictly recorded and monitored. ATM transactions is fast and convenient because it was fully computerized but still its transactions are recorded and can be easily reviewed if needed. If your intention is good then you should abide the law and have a happy bitcoin exchanges business of your own.