Can I be arrested in Switzerland based solely on an Interpol Red Notice without a formal extradition request?

Yes, Swiss authorities can provisionally arrest you based on a Red Notice for up to 18 days under the Federal Act on International Mutual Assistance in Criminal Matters. During this period, the requesting state must submit a formal extradition request through diplomatic channels. If no request arrives within the deadline, you must be released. However, authorities may impose travel restrictions or require you to surrender your passport while awaiting the formal request. This provisional arrest period is critical for mounting an early defence.