The objection (Einspruch) under § 491 StPO is the only remedy against the penal order. It must be lodged in writing with the issuing district court within FOUR WEEKS of service. No statement of reasons is required, though in practice it is advisable to provide one. On a timely objection the penal order lapses and the court initiates ordinary proceedings with a main hearing. This gives the accused the opportunity to present their account, adduce evidence and, if the conditions are met, pursue diversion.
Diversion under §§ 198 ff StPO is frequently available for negligent bodily injury without serious consequences. It results in no conviction and no criminal record entry. Possible diversionary measures include a monetary fine (paid voluntarily by the accused), a probation period, community service or restitution (for example compensating the injured person for their loss). From the perspective of the accused, diversion is normally a significantly better outcome than a conviction, not least because of the consequences in the home country.
The two options are not mutually exclusive. Anyone who lodges an objection can pursue diversion in the subsequent proceedings. Anyone who thinks they can simply ignore the penal order, or who reacts only after the four-week deadline has passed, allows the penal order to become final and thereby forfeits all room for manoeuvre. The deadline is firm, FOUR WEEKS from service, with no possibility of extension.