Bill of health. The Bill of Health is the certificate that used to be issued by the local authorities indicating the general health conditions in the port of departure or ports of call.
Before sailing, the Bill of Health was given a visa by the Consul of the country of destination. International Health Regulations now apply, and Bills of Health are no longer very common, but not all countries are bound by these. In some countries Bills of Health issued by the Consuls of those countries may be officially required.