Reference Letter: What to Write, and What to Refuse
Published · 9 min read
A reference letter is not a compliment. It is a claim by a named person, with a title and a job at stake, that someone did specific work to a specific standard. The letters that help are the ones that could be falsified, because a claim nobody could check is a claim nobody trusts.
That single idea explains almost every rule below. The reason most reference letters land with a thud is that they say warm, unverifiable things — hardworking, great team player, a pleasure to have around — which the reader has seen five hundred times and which cost the writer nothing to say.
What the reader is actually checking
Whoever reads this is not looking for praise. They are usually checking three things, in order: that you existed in the role you claimed, that nothing alarming happened, and that someone credible will attach their name to you. Praise is the fourth priority at best.
This is why the relationship line matters more than the adjectives. "I was Maria's direct manager for two years" does more work than a paragraph of admiration, because it establishes that the writer was positioned to know.
The four things every reference letter must contain
- The relationship, with duration and reporting line. Who you are to the candidate, and for how long. Without this, nothing that follows can be weighed.
- At least one specific, dated thing they did. Not a trait. A piece of work, with enough detail that it could be checked.
- A comparison or a scale. "One of the three strongest analysts I have managed" tells a reader something. "Very strong" does not.
- A clear, unhedged recommendation, and a way to reach you. A letter that will not say plainly whether the writer recommends the person has already answered the question.
Why a vague positive letter reads as a negative one
Experienced readers treat unusually generic praise as a signal. If a manager of two years cannot produce one concrete example, the reader tends to conclude one of two things: the writer did not know the person well, or the writer is being careful. Neither helps the candidate.
There is a well-known version of this in academia, sometimes called the damning-with-faint-praise letter, where every sentence is technically positive and the overall effect is fatal. "She was always punctual and pleasant to work with" is a sentence written by someone who has nothing else to say.
Tip: If you cannot write a specific, checkable sentence about someone's work, you are not the right person to write their reference. Say so kindly and early rather than writing a weak letter that quietly damages them.
When to say no
Declining is a legitimate and often generous answer. Reasonable grounds to decline: you did not work with them closely enough to say anything specific, you genuinely cannot recommend them, or you are being asked to speak to work you never saw.
The kind way to decline is quick and honest, without a verdict attached. "I do not think I am the best person for this — we overlapped for three months and I would not be able to speak to your project work in any detail. Would someone from that team be better placed?" That is a real reason, and it hands them a next step.
What employers can and cannot say
This is where writing on behalf of a company differs from writing personally. Many organisations restrict references to confirming dates of employment and job title, and route all requests to HR. That is a company policy decision, not a legal universal, and it varies by country and employer.
Two practical consequences. If you are writing as a manager, check whether your employer has a reference policy before you write anything on letterhead. If you are requesting one, ask early whether the company allows substantive references at all — discovering that it does not, after listing someone as a referee, wastes a stage of your application.
A worked example
Weak version, and the kind most people receive: "I am pleased to recommend James. He is a hardworking and dedicated employee who always gives his best. He works well in a team and is well liked by colleagues. I am confident he will be an asset to any organisation."
Nothing in that paragraph could be false. That is exactly the problem — it would read identically for someone the writer barely remembers.
Stronger version: "I managed James directly for three years as his team lead in customer operations. In 2025 he took over our refund backlog, which was then about six weeks old, and rebuilt how the queue was triaged; it was current within two months and stayed there. He also trained the two people who joined the team after him, and both were handling cases independently faster than anyone before them. I would hire him again without hesitation, and I am happy to speak by phone on the number below."
The second version names the relationship, gives a dated and checkable piece of work, includes a comparison, and ends with an unhedged recommendation and a route to verify it. It is also barely longer than the weak one.
Length, format and tone
- One page. A reference letter that runs to two pages is usually padding an absence of specifics.
- Three to four paragraphs: relationship, evidence, assessment, contact details.
- Company letterhead if you are writing in a professional capacity and policy allows it; plain and clearly personal if not.
- Address it to a person where you know one, and use a general opening where you do not. Never invent a recipient.
- Sign it with your full name, job title and a working contact method. An unsigned, uncontactable reference is close to worthless.
If you are the one asking
Make it easy to say yes and easy to be specific. Send the job description, remind them of the two or three pieces of work you would most like mentioned, and give a real deadline. You are not writing it for them; you are removing the blank page, which is the actual obstacle.
Ask whether they can write a strong letter, not whether they will write one. That phrasing gives a hesitant referee a graceful exit, and a hesitant referee is one you want to find out about now rather than later.
One last point that applies to every letter here: the person signing it is lending their credibility. Treat that as the scarce resource it is, and write something a reader could actually check.