What document might specify a person's wishes regarding post-death arrangements?

The document that specifically outlines a person's wishes regarding post-death arrangements is the will. A will allows individuals to express their desires concerning the distribution of their assets, guardianship of minor children, and can also include instructions for their funeral or memorial services. While advance directives are important for decisions about medical care when a person is unable to speak for themselves, they do not usually cover post-death arrangements. Prenuptial agreements deal with the distribution of assets in the event of divorce rather than after death, and power of attorney pertains to granting someone authority to make decisions on another's behalf during their lifetime, not about their wishes after death. Thus, the will is the primary legal document that can convey specific post-death instructions.