312.0
STPOCPP
CH
CH
Art. 309 Schweizerische Strafprozessordnung (StPO) - Eröffnung
StPO; 6. Titel: Vorverfahren; 3. Kapitel: Untersuchung durch die Staatsanwaltschaft
Art. 309 StPO · Eröffnung
Die Staatsanwaltschaft eröffnet eine Untersuchung, wenn: a. sich aus den Informationen und Berichten der Polizei, aus der Strafanzeige oder aus ihren eigenen Feststellungen ein hinreichender Tatverdacht ergibt; b. sie Zwangsmassnahmen anordnet; c. sie im Sinne von Artikel 307 Absatz 1 durch die Polizei informiert worden ist.
Sie kann polizeiliche Berichte und Strafanzeigen, aus denen der Tatverdacht nicht deutlich hervorgeht, der Polizei zur Durchführung ergänzender Ermittlungen überweisen.
Sie eröffnet die Untersuchung in einer Verfügung; darin bezeichnet sie die beschuldigte Person und die Straftat, die ihr zur Last gelegt wird. Die Verfügung braucht nicht begründet und eröffnet zu werden. Sie ist nicht anfechtbar.
Die Staatsanwaltschaft verzichtet auf die Eröffnung, wenn sie sofort eine Nichtanhandnahmeverfügung oder einen Strafbefehl erlässt.
Gerichtsentscheide zu dieser Bestimmung (815)
BG.2025.37 (Art. 309 Abs. 1 lit. a StPO)
Jurisdictional Dispute Between Cantons: Zurich Responsible for Prosecution
This article was cited regarding the opening of a criminal investigation if there is sufficient suspicion of a criminal act.
BG.2025.37 (Art. 309 Abs. 2 StPO)
Jurisdictional Dispute Between Cantons: Zurich Responsible for Prosecution
This article was cited as the trigger for the 10-day entry deadline into VOSTRA upon establishing sufficient grounds for suspicion.
BG.2025.37 (Art. 309 Abs. 2 StPO)
Jurisdictional Dispute Between Cantons: Zurich Responsible for Prosecution
This article was mentioned in relation to the point at which the timeframe for entry into VOSTRA is triggered, based on sufficient suspicion.
BG.2025.37 (Art. 309 Abs. 4 StPO)
Jurisdictional Dispute Between Cantons: Zurich Responsible for Prosecution
This article was cited in relation to the waiver of opening an investigation when an order of non-commencement is issued immediately.
BB.2026.36 (Art. 309 Abs. 1 lit. a StPO)
Financial Crimes Complaint Dismissed on Lack of Specificity
Sets the requirement for a sufficient suspicion of a criminal offense to open an investigation.
BG.2025.84 (Art. 309 Abs. 2 StPO)
Jurisdiction Dispute Between Cantons Over Fraud Case
This provision concerning the delegation of investigative tasks to the police was mentioned in the factual background.
BG.2025.79 (art. 309 CPP)
Vaud v. Bern: Jurisdictional Dispute over Bicycle Thefts
Referred to in the context of what constitutes a prosecution act, even if a formal investigation has not been opened.
BB.2025.30 (Art. 309 al. 1 lit. a StPO)
Complainant's Appeal Regarding Federal Supreme Court Data Protection Allegations Dismissed
Requires sufficient suspicion of a criminal offense to open an investigation.
SBK.2025.228 · ag (Art. 309 Abs. 1 lit. a StPO)
False Accusation Claim: Prior Conviction Required; Standing Lacking for Misleading Justice Charge
Cited as the basis for the public prosecutor's office to open an investigation when there is sufficient suspicion of a criminal offense.
502 2025 178 · fr (art. 309 al. 1 CPP)
Cantonal Tribunal Overturns Non-Entry Order in Alleged CHF 51,000 Share Transfer Fraud Case
The court ordered the case to be sent back to the Public Prosecutor to proceed according to the considerations, which included the possibility of opening an investigation under this article.
502 2025 178 · fr (art. 309 al. 2 CPP)
Cantonal Tribunal Overturns Non-Entry Order in Alleged CHF 51,000 Share Transfer Fraud Case
The court ordered the case to be sent back to the Public Prosecutor to proceed according to the considerations, which included the instruction to request supplementary investigation from the police under this article.
502 2025 178 · fr (art. 309 al. 4 CPP)
Cantonal Tribunal Overturns Non-Entry Order in Alleged CHF 51,000 Share Transfer Fraud Case
The court ordered the case to be sent back to the Public Prosecutor to proceed according to the considerations, which included the possibility of issuing an order of non-entry into proceedings under this article after supplementary investigations.
BK 2025 293 · be (Art. 309 Abs. 1 Bst. a StPO)
Appeal Against Non-Initiation of Proceedings for Breach of Professional Secrecy and Denial of Legal Aid
Cited in the reasoning regarding the threshold for opening an investigation, but not in the final orders.
P/18822/2025 · ge (art. 309 al. 1 let. a CPP)
Complainant v. Medical Assistant Regarding Data Access and Professional Secrecy
Cited in contrast to Art. 310 CPP, establishing the obligation to open an instruction if sufficient suspicion exists.
P/26351/2023 · ge (art. 309 CPP)
Prosecutor's Refusal to Prosecute Fraud and Forgery Against Attorney Upheld
Cited in the reasoning regarding the procedure for opening an investigation, relevant to the formal error in the decision.