Does a Red Notice mean I will definitely be extradited if arrested?

No. A Red Notice is a request to locate and provisionally arrest — it is not an international arrest warrant and does not compel extradition. Extradition depends entirely on the domestic law of the arresting state and any applicable treaties with the requesting country. Many extradition requests are successfully opposed on grounds including political offence exceptions, human rights bars, dual criminality failures, or passage of time. Courts in the UK, Germany, and other jurisdictions regularly refuse surrender despite valid Red Notices when fair trial concerns or disproportionality are established.