Critical to obtaining effective relief against a wrongdoing defendant is being able to serve process on that defendant in a manner that the forum hearing the dispute will deem sufficient, and that meets constitutional due process requirements for giving a defendant notice. Sometimes, though, this is easier said than done. This is especially so when litigating matters involving cryptocurrencies and other blockchain tokens. In such cases, the defendants being sued not infrequently operate only anonymously or pseudonymously, without ever disclosing their true names, physical addresses or even their general location—and that location might be anywhere in the world.