I will discuss different options for distinguishing Majorana from Dirac neutrinos, including neutrino scattering, neutrino decay, and searches for lepton-number violating processes other than neutrinoless double-beta decay (e.g. mu^- to e^+ conversion in nuclei). In the case of the less powerful probes of lepton-number violation, I will discuss concrete theoretical circumstances where they provide nontrivial information.