Warning Letter

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What a warning letter is

A warning letter is a formal document an employer issues to record that an employee’s conduct or performance has fallen short of an agreed standard. It typically follows informal discussions and forms part of a wider disciplinary or performance process.

Its purpose is to give the employee a clear, written account of the concern, an opportunity to improve and an understanding of the consequences of continued shortfalls. It also creates a fair, dated record that both sides can refer back to.

When a warning letter is used

• When informal conversations have not resolved a conduct or performance issue.
• When an employer wants to formally document a concern as part of a structured process.
• When a specific incident warrants a recorded response rather than an informal note.
• As an early or intermediate stage before more serious measures are considered.
• When an employee needs a clear written description of the standard expected.

What a well-formed warning letter includes

• The employee’s name, role and the date the letter is issued.
• A clear description of the conduct or performance concern, with relevant facts.
• Reference to any policy, standard or prior discussion the concern relates to.
• The specific improvement or change expected, stated plainly.
• A reasonable timeframe and any support or review arrangements.
• The consequences if the concern continues or is repeated.
• Reference to the employee’s right to respond or appeal where applicable.
• A space for signatures and acknowledgement of receipt.

Common mistakes

• Being vague about the concern, so the employee cannot tell what to fix.
• Skipping earlier informal steps that a fair process expects.
• Including personal or emotive language rather than neutral facts.
• Failing to state the expected standard and a timeframe to meet it.
• Not giving the employee a chance to respond before the letter is finalised.
• Keeping no signed or dated record that the letter was received.

Good practice

• Stick to specific, factual descriptions and an even, professional tone.
• Tie the concern to a known policy, role expectation or prior conversation.
• Set realistic expectations and offer support where it is appropriate.
• Keep a dated, signed copy and store it securely with the employee’s record.
• Be consistent in how similar situations are handled across the team.