Bills of Mortality, also known as death certificates, are official documents that record the details of a person's death. However, there are several synonyms that can be used to refer to these documents, including mortality schedules, death notices, and death registers. Mortality schedules are often used in the United States to describe the various ways in which deaths are recorded and compiled. Death notices and death registers are more commonly used terms that describe the official records of deaths that occur in a particular area or jurisdiction. Regardless of the terminology used, bills of mortality are important documents that provide insight into the causes and impact of death on a community.