For visa requirements when entering Indonesia, see the Indonesia | Get in section. Note that Nunukan is not listed as a visa-on-arrival entry point. Visas need to be obtained before hand. Citizens of countries not needing visa to enter Indonesia can freely enter via this checkpoint.
Nunukan's Immigration office Kantor Imigrasi is about 200m from the port on Jalan Pelabuhan into town and opens at 8am.
