What is the difference between an immigration ban and an international arrest warrant?

An immigration ban is an administrative measure preventing entry to a specific country, often imposed for overstaying visas, deportation history, or national security concerns — it does not authorise detention beyond refusal of entry. An international arrest warrant, whether through Interpol Red Notice or bilateral treaty, authorises physical detention and potential extradition to the requesting state. The legal consequences differ dramatically: a ban results in denied boarding or return at the border, while an arrest warrant can lead to prolonged detention pending extradition proceedings that may last 6–18 months.