This article highlights the importance of accounting for the dead in migration contexts, from international humanitarian law (IHL), international human rights law (IHRL), and forensic perspectives. Starting by reviewing obligations under IHL and IHRL for the processes of accounting, the article discusses forensic action and the role that accounting can play to protect the dead and clarify the fate and whereabouts of the missing for their families. Considering the complexity of missing and deceased migrant cases, this problem must be approached from several complementary angles, including States codifying international legal obligations related to accounting for the dead in domestic legal or policy frameworks; developing national mechanisms to collect, centralize, and report disaggregated information on migrant deaths; addressing migrant deaths from a public health perspective; pursuing identification efforts including participating in transnational coordination mechanisms; developing strong partnerships with civil society actors; and coupling accounting initiatives with policies that promote the search for missing migrants.