It is no question today that privacy on Ethereum is still one of the largest remaining challenges. Several attempts have been made to enable different kinds of privacy, including network layer privacy, confidential token transfers, and private smart contracts. Surprisingly, however, we still lack a truly usable solution for one of the seemingly most simple problems—receiving payments anonymously. Today, we outline the problem space of anonymous payments, how stealth addresses help solve the issue, and what outstanding UX problems remain. This is part one of a two-part blog post, where we outline the current state of anonymous payments in this first post, and discuss Nocturne’s approach more in the second post.