A formal warning (Abmahnung) is an employment law instrument through which an employer formally reprimands an employee for a specific breach of duty and warns that termination may follow if the behaviour is repeated. It is generally a prerequisite for a valid conduct-based dismissal, and must be specific in content, issued promptly, and ideally in writing. The legal basis is § 314 (2) of the German Civil Code (Bürgerliches Gesetzbuch, BGB).
What Is a Formal Warning (Abmahnung)?
Definition and Legal Basis
A formal warning (Abmahnung) is an employer's official reprimand issued to an employee in response to a breach of contractual duties. It identifies a specific instance of misconduct and simultaneously signals that repeated behaviour may result in employment consequences, including termination.
The legal basis is found in § 314 (2) BGB. There is no detailed standalone statute governing the Abmahnung – its requirements have been shaped primarily by the long-standing case law of the Federal Labour Court (Bundesarbeitsgericht, BAG).
The formal warning is considered the mildest disciplinary measure available before termination. It reflects the principle of proportionality (Verhältnismäßigkeitsgrundsatz): before taking the most severe step – dismissal – the employer must give the employee an opportunity to correct their behaviour.
Formal Warning vs. Informal Reprimand – the Difference
The two terms are often confused in everyday practice, but the legal distinction is decisive:
An informal reprimand (Ermahnung) is a milder form of censure without any threat of consequences. It is not sufficient on its own to support a later dismissal. An employer who issues only an informal reprimand and then proceeds directly to termination risks having that termination declared invalid in employment court proceedings.
Functions of the Formal Warning
Reprimand Function: Naming the Misconduct Clearly
The formal warning must describe the specific misconduct with enough precision that the employee can clearly understand what is being criticised. General phrases such as "frequent lateness" or "insufficient work performance" do not meet the standard.
The correct approach is to specify the date, time, location and exact circumstances. Example: "On 12 March 2026 at 9:15 a.m., you arrived at your workplace 75 minutes after your contractually agreed start time, without prior notice or apology."
Warning Function: Announcing Consequences
The warning function is the defining feature that distinguishes a formal warning from a mere reprimand. The formal warning must explicitly state that a repeat of the behaviour may result in termination.
If this notification is absent, the document does not legally constitute a formal warning – only an informal reprimand. Any subsequent termination may then be at risk of being declared invalid.
Documentation Function: Securing Evidence
The formal warning documents the misconduct and preserves evidence for any future unfair dismissal proceedings. Importantly: the burden of proof lies with the employer. If challenged, you must be able to demonstrate that the warning was issued, correctly formulated and actually delivered to the employee.
For this reason, the written form with personal delivery (against a signed acknowledgement of receipt) or by recorded post is always strongly recommended.
When Is a Formal Warning Justified?
Typical Grounds for a Formal Warning
A formal warning applies to controllable misconduct – behaviour that the employee can consciously influence. Typical grounds include:
- Repeated lateness without apology
- Unauthorised absence or taking leave without approval
- Refusal to carry out work or ignoring instructions from a supervisor
- Alcohol consumption at work (in safety-sensitive roles or where prohibited)
- Breaches of confidentiality or disclosure of trade secrets
- Unauthorised personal use of company equipment
- Insults directed at colleagues or supervisors (in less severe cases)
Important: as an employer, you must assess in each individual case whether the breach is serious enough. Not every minor issue justifies a formal warning – the principle of proportionality always applies.
No formal warning is appropriate for person-related reasons such as illness-related absences. The instrument of conduct-based dismissal does not apply in such cases.
When a Formal Warning Is Not Required
In certain circumstances, a formal warning is not necessary – meaning you can proceed directly to termination:
- In cases of serious breach of duty, where the employee could have been expected to know that the behaviour would not be tolerated (e.g. theft, physical assault, sexual harassment)
- Where a change in behaviour is not to be expected, even after a warning
- In the case of extraordinary termination without notice for good cause (§ 626 BGB) – though even here, at least one prior unsuccessful formal warning is generally expected unless the breach is particularly severe
Whether a formal warning is dispensable always depends on the specific circumstances of the case. When in doubt, seek legal advice.
What Must a Valid Formal Warning Contain?
Mandatory Content at a Glance
A formal warning is only legally valid if it includes all essential elements. The following checklist will help you verify compliance:
Mandatory content of a valid formal warning:
- Specific description of the incident: Date, time, location and precise account of the misconduct
- Identification of the contractual breach: Which duty was violated?
- Reprimand: A clear statement that the behaviour is unacceptable
- Request for future compliance: Your expectation of the employee's future conduct
- Threat of consequences: An explicit warning that termination may follow if the behaviour is repeated (warning function!)
- Signature: Of the person authorised to issue the warning
Any person with the authority to issue instructions to the employee is entitled to issue a formal warning – this includes not only senior management, but also direct line managers with supervisory authority (Direktionsrecht).
Sample Formulations for Practice
Example 1 – Lateness:
"On 12 March 2026 at 9:15 a.m., you arrived at your workplace 75 minutes after your contractually agreed start time. This constitutes a breach of your contractual obligations. We call upon you to arrive punctually at your agreed start time in future. Should this behaviour recur, we reserve the right to terminate your employment."
Example 2 – Refusal to work:
"On 5 March 2026 at 2:00 p.m., your supervisor Ms Müller instructed you to take on task X. You declined with the words: 'That is not my job.' In doing so, you refused a reasonable and lawful instruction and breached your contractual obligations. We expect you to follow legitimate instructions in future. Should this behaviour recur, we reserve the right to terminate your employment."
Form: Written or Oral?
A formal warning has no mandatory form requirement – it may also be issued verbally. In practice, however, this is rarely advisable: you as the employer bear the burden of proof. An oral warning is very difficult to prove in employment court proceedings.
Strong recommendation: Always issue the warning in writing, delivered personally (with a signed acknowledgement of receipt) or by recorded post. The warning should subsequently be placed in the personnel file.
Pay attention to timing: although there is no statutory exclusion period, the warning function weakens with the passage of time. In practice, act within two weeks of the incident at the latest.
Formal Warning and the Personnel File
The formal warning is documented in the employee's personnel file, where it remains for as long as it is relevant to the employment relationship. There is no statutory deletion deadline.
In practice, the weight of a formal warning diminishes over time: after two to three years – particularly where the employee's behaviour has clearly improved – a dismissal can no longer be based on that warning alone.
Objection and removal from the personnel file:
The employee may object to the formal warning and submit a written counter-statement, which must also be placed in the personnel file. In addition, the employee has the right to demand removal of the warning from the personnel file if it is factually incorrect or formally invalid. This right can also be enforced through the courts.
Frequently Asked Questions About the Formal Warning
When is a formal warning justified?
A formal warning requires controllable misconduct. The breach must be clearly demonstrable and something the employer cannot reasonably be expected to accept. Not every minor matter justifies a formal warning – the principle of proportionality requires choosing the mildest appropriate measure. Where the cause is person-related (e.g. illness), a conduct-based formal warning is generally not appropriate.
Does a formal warning have to be in writing?
No – there is no statutory requirement for written form. However, written form is strongly recommended for practical reasons, since as an employer you bear the burden of proof in any dispute. An oral warning is almost impossible to substantiate and jeopardises any subsequent termination.
What must a formal warning contain?
A valid formal warning must describe the misconduct specifically and comprehensibly (date, location, circumstances), identify it as a breach of duty, request future compliance with contractual obligations, and explicitly state that termination may follow if the behaviour is repeated. If any of these elements is missing – particularly the threat of termination – the warning is not legally valid.
How many formal warnings are required before termination?
There is no statutory minimum number. As a rule, a single formal warning suffices. For very minor breaches, it may be advisable to issue two warnings. Beware of issuing too many warnings in quick succession: this can undermine the warning function and risk the subsequent termination being overturned in court.
When is a formal warning unnecessary?
In cases of particularly serious breach of duty – such as theft, physical assault or severe sexual harassment – you may proceed directly to termination if the employee could have been expected to know that the behaviour would not be tolerated. A formal warning may also be dispensable if a change in behaviour is not realistically to be expected even after one is issued. This is always a case-by-case decision.
How long does a formal warning remain on the personnel file?
There is no statutory time limit. In practice, a formal warning loses its relevance for any subsequent termination after two to three years – especially where the employee's behaviour has clearly improved. The employee may demand removal of the warning if it is factually incorrect or formally invalid.
Can an employee issue a formal warning to the employer?
Yes – employees can also issue a formal warning to the employer, for example if salary is not paid or is paid late. The warning should be issued in writing and is a prerequisite if the employee subsequently wishes to terminate the employment relationship for good cause (außerordentliche Kündigung).
Conclusion
The formal warning (Abmahnung) is a central instrument of German employment law – and one of the most common stumbling blocks in day-to-day HR practice. The key point: a valid formal warning requires a specifically described and controllable instance of misconduct, a clear reprimand, and an explicit warning that termination may follow if the behaviour is repeated. Omitting any one of these elements risks failure in employment court proceedings.
As an HR professional, it is always worth issuing formal warnings in writing, promptly and with precision – and seeking legal advice before proceeding to dismissal when in doubt.
Professional HR processes, however, do not begin only when conflict arises. Those who rely on objective, scientifically founded methods from the very start of personnel selection reduce the risk of poor hiring decisions and the downstream employment law issues that can follow. The digital platform Aivy supports this with validated diagnostic tools that enable fair, data-based selection decisions.
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Sources
- § 314 (2) German Civil Code (BGB). Federal Ministry of Justice, 2023. https://www.gesetze-im-internet.de/bgb/__314.html
- Established case law of the Federal Labour Court (BAG) on conduct-based dismissal. https://www.bundesarbeitsgericht.de
- Tormählen, Johanna (Specialist Employment Lawyer): "Abmahnung im Arbeitsrecht – 10 Fakten". Haufe, 2025. https://www.haufe.de/recht/arbeits-sozialrecht/abmahnung-im-arbeitsrecht-10-fakten-die-sie-kennen-sollten_218_532266.html
- IHK Regensburg für Oberpfalz / Kelheim: Merkblatt Abmahnung. https://www.ihk.de/regensburg/fachthemen/recht/arbeitsrecht/kuendigung-abmahnung-arbeitszeugnis/abmahnung-1316872
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