Much more than KYC payment apps like Zelle or CashApp and WAY more private than KYC exchanges. USPS privacy law is strict and the trail is only kept on paper unless law enforcement can prove probable cause or you declare a value over $10,000 in which you have to submit an IRS form of the transaction. You can send it in the mail in another state, writing with your left hand, wearing gloves, with cash recieved from businesses instead of an ATM, with a fake return address etc. etc. This is nearly perfectly private but risks loss of funds. The tradeoff is up to you.